Every few hundred years most of the planets line up on the same side of the Sun. Calculate the total

Every few hundred years most of the planets
line up on the same side of the Sun. Calculate the total force on the Earth due
to Venus, Jupiter, and Saturn, assuming all four planets are in a line, Fig. 6
24. The masses are Mv = 0.815 ME, Mj = 318 Me,
MSat = 95.1 ME, and the mean distances of the four
planets from the Sun are 108, 150, 778, and 1430 million km. What fraction of
the Sun’s force on the Earth is this?