Two charged balls, one with a charge of +5.0uC and the other with a charge of +2.4uC, are placed a distance d=10.0cm apart from each other and rigidly held in place. A third ball with a charge of -3.0uC is dangled from a string between the two charged balls such that it remains in equilibrium. Calculate the distance the third charged ball is from the +5.0uC charge.