Help with making a specific concave shaped geometry

Hey guys, I’m modeling this curved wall in the interior of a residence, and I’m stumped.

Desired result:
image

image
The highlighted shape is where I’m having trouble.

What I’ve got so far:

image

Is there an extension that makes that shape using the other three geometries’ edges? Or is it somehow possible with the follow me tool?

Thanks in advance

Fredo Curviloft, Sandbox, etc.

Thanks (that was super fast),
will check them out.

Or “hand-stitching”: draw edges from endpoint to endpoint to create triangles, soften edges when finished.

That could be done easily if the geometry had just two arcs and a straight line, but it has three arcs, using sandbox, curviloft or soap skin bubble will generate a better mesh.

I just finished the shape. It has three arcs. If I hadn’t posted on the forum at the same time, it would have taken me maybe 2 minutes.
image
This has a largish triangle hidden in the middle but I think it would still look OK in a render. To manufacture it you would need a “better mesh” but a plasterer would probably just trace the arcs and start building the shape from them.

this is how it looks in curviloft