Solve the Proportion $$\frac { x } { 18 } = \frac { 4 } { x + 1 }$$

Multiple Choice

Solve the proportion. $$\frac { x } { 18 } = \frac { 4 } { x + 1 }$$

A) $\quad x _ { 1 } = - 9 , x _ { 2 } = 8$
B) $\quad x _ { 1 } = 9 , x _ { 2 } = 8$
C) $\quad x _ { 1 } = - 9 , x _ { 2 } = - 8$
D) $\quad x _ { 1 } = 9 , x _ { 2 } = - 8$
E) no solutions