Yeah I'm 63 and a bit dyslexic, my number crunching isn't what it used to be. If I sort of understand your situation the first link

@SonnyAgain posted is on the right track but not in the easiest form.

Circle defined by 3 points

www.ambrsoft.com

I like this one, you can put in 3 X,Y points on the circle and it will tell you the radius and center of the circle. Say the 2 doors are each 15" wide and in the center where the doors meet they are 1" higher than at the left and right corners. Make the meeting of the doors the Y axis and the corners on the X axis. So the meeting point is 0,1 and the corners are -15,0 and 15,0. Put those coordinates in the calculator, the order of the points doesn't matter, and it will tell you the radius etc.

In what I just said I was thinking of an upward arc at the top of the doors, like the photos

@SonnyAgain posted. But you want the doors to bulge outward? As if the doors are cut from a large cylinder? That would be like stave construction, for building drums etc. And you want the face of the doors to be a continuous curve, not with each wood strip still having it's own face? With a radius of 113" not the easiest router jig to make lol. Hand planing maybe? Please post a sketch of what you want to do.