Again, the forces acting on the two poles of magnet 3 due to magnet 1 are not equalin magnitude. Since the south-pole of magnet 3 is far from the magnet 1, the forceacting on it will be smaller than the force on the north-pole of magnet 3. Thereforethe net force on magnet 3 will be towards up and right.
Next we consider the force on the magnet 3 due to magnet 2. By following the samechain of reasoning, we can conclude that the net force on the magnet 3 will betowards up and left direction.So the directions of the forces due to magnet 1 and magnet 2 are as following:Magnet 1 - Right and UpwardMagnet 2 - Left and UpwardAlso since the magnet 3 is equidistant from both the magnets, the magnitude of theforces from both the magnets will be same. Therefore, we can conclude that the leftand right components of the forces will cancel each other while the forces inupward direction will add up. Consequently the net force on the magnet 3 will be inupward direction.Hence, the net magnetic force acting on magnet 3 will be inupward direction.