Subtotals by dimension in the last position

I have 4 dimension in the report. Dim1 Dim2 Dim3 Dim4 with dynamic expansion. I need a subtotal rows at the bottom for all members of Dim4 (PROJECT)

See the sample report image. Is it possible to create subtotals for dimension in the final position of a axes.

I have already tried to create a local member =SUM(EPMSELECTEDMEMBER(PROJECT)) with Insert After Row axis option but did not work.

I cannot move the Dim4 to any other position.

Thank for your replies.