Electrostatics: JEE Main 2021 Physics question

An infinite number of point charges, each carrying 1 $\mu$C charge, are placed along the y-axis at y = 1 m, 2 m, 4 m, 8 m ............... The total force on a 1C point charge, placed at the origin, is x $\times$ 10³ N. The value of x, to the nearest integer, is __________. [Take ${1 \over {4\pi {\varepsilon _0}}} = 9 \times {10^9}$ Nm²/C²]