I don't know if this will be what you're looking for but here goes.
Each page of the document has to be numbered separately.
In your case open page 4 and go to View/Header and Footer.Scroll down to the bottom of the page and you will see the Footer text box.Insert the cursor [which by default is in the left margin] then press the tab key twice and the cursor will position itself in the right margin.Enter the page number.
The Footer text box can be resized by using the page margin markers at the top.
Slow I know for seventy odd pages but this is the only way I know how to do it.