Is it possible to have 3 y axis? My previous consultant mentioned to them its possible but I've never seen any sample report that goes beyond 2 y axis.
I've never used it, but if you go to the advanced section under chart there's a 3-D Axis Column format. I don't know if that's what you're looking for, but i'd be wary about how legible the output would be. I presume what you're looking for is something along the lines (no pun intended) of a surface graph...but let us know if not.