Instantiating game object

So I have a model which is shown as follows:

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As you can see there are two sliders and 2 planes whose scale I have reduced to make them seem like lines. There must be better ways for drawing lines. I want to instantiate an object at the intersection point(red circle). I can move the horizontal and vertical lines (orange) using the sliders and where ever they intersect I want to instantiate a gameobject which can be a small sphere. So how can I approach this problem.

You can either find the point of intersection using the planes but likely the best way is to do some math using the slider values to place the red dot. As it seems that the lines will always intersect in some way based on the sliders and constrained position, you should be able to translate the y slider value into a y coordinate and the x slider value into a x coordinate. Place the red circle there :smiley: