The situation in which the magnitude of the total force is greater than the magnitude of each of the individual forces would be:
Four people stand on each side of a large box. All four people push the box with the same amount of force.
In this scenario, the forces add together because they are all acting in the same direction (pushing). Therefore, the total force exerted on the box would be the sum of the individual forces, resulting in a greater magnitude than any individual force alone.
In contrast, the other scenarios either involve opposing forces (where they would cancel each other out) or they don't involve enough input to exceed the individual force magnitudes.