Is it Possible to Get Maximum Weighted Input Value in a Neural Network?
No, not with standard activation functions, but you might be able to approximate it.  For instance, if the activation function is differentiable, then the output of such a network will always be differentiable, but the "max" function is not differentiable.

You're more likely to get a useful answer if you provided some context about what you're trying to accomplish or how you'll use the answer.  I suspect an XY problem.