Delete the page number on the fifth page, then re-insert the field manually, via Ctrl-F9 to create the field braces (i.e. { }) then typing PAGE between them, so you get {PAGE}, then select the field and press F9 to update. Finally, change the paragraph alignment to whatever you want (presumably, right).

__________________
Cheers,
Paul Edstein
[Fmr MS MVP - Word]