I don't think it's possible (I may be wrong, though).
Reason: The curvature of the left curve (1/1600mm) is higher than the right (1/10000mm). So you want the curvature to drop from the left to the right. But you actually need to increase it, if you want the left curve to connect to the right one. Imagine you just keep the curvature of the left curve the same. Even then you wouldn't hit the right curve when making the left one longer (you would end up below the right curve). So somewhere between the curves you need to increase the curvature, something you don't want.