Gravitation: JEE Main 2021 Physics question

The initial velocity v_i required to project a body vertically upward from the surface of the earth to reach a height of 10R, where R is the radius of the earth, may be described in terms of escape velocity v_e such that ${v_i} = \sqrt {{x \over y}} \times {v_e}$. The value of x will be ____________.