Two positive point charges, \(q_1 = Q\) and \(q_2 = \beta Q\) (where \(\beta > 1\) is a dimensionless constant), are fixed on the \(x\)-axis at \(x = 0\) and \(x = d\), respectively. A third positive point charge \(+q\) is placed on the \(x\)-axis between \(q_1\) and \(q_2\) in the region \(0 < x < d\). At what position \(x\) is the net electrostatic force on \(+q\) equal to zero?