The ratings represent a week-on-week decline of 1.5m but an increase of around 1.2m on the equivalent episode from last year's run. Series to date, The X Factor has averaged an impressive 10.42m.
ITV2 spinoff show The Xtra Factor remained level week-on-week, averaging 1.27m (6.6%) from 8.15pm and 149k (0.8%) on timeshift.
After The X Factor on ITV1, gameshow The Cube delivered a healthy 4.82m (22.9%). Jennifer Aniston romcom The Break-Up then kept 2.16m (11.5%) over two hours from 9.15pm.
The latest Lottery draw put in 3.14m (14.9%) for BBC One at 8pm, then 15 minutes later, Casualty had 5.1m (24.2%). Coverage of The Proms averaged 4.41m (22.9%) between 9.05pm and 10.55pm.
BBC Two's prior coverage of The Proms had averaged 1.57m (7.5%) from 7.30pm. Documentary The Last Nazis interested 1.44m (7.2%) at 9.05pm, then a repeat of Have I Got A Bit More News For You took 1.5m (8%) an hour later.
Elsewhere, the last ever episode of ER had a disappointing performance for Channel 4, with an average of just 480k (2.3%) tuning in between 7.25pm and 9.10pm. A screening of Take The Lead followed with 1.39m (7.4%).
On Five, repeats of NCIS, CSI and Law & Order: SVU delivered 1.01m (4.8%), 1.32m (6.6%) and 1.12m (6%) respectively from 8pm.
ITV1 had the edge in primetime overall with an average audience share of 26.8% to BBC One's 19.8%. BBC Two was third with 7.4%, followed by Channel 4 with 4.6% (+1: 0.4%) and Five with 4.9%.
BARB ratings data supplied by Attentional