Answer
x=19.3
Work Step by Step
Set the product of the means equal to the product of the extremes and solve for the variable.
$3x \times0.575=0.120\times 277$
$1.725x=33.24$
$1.725x\div1.725=33.24\div1.725$
$x=19.\underset\uparrow269$
Since the digit to the right of the 3rd significant digit is greater than 5, round up.
