Answer
x=229
Work Step by Step
Set the product of the means equal to the product of the extremes and solve for the variable.
$0.355 \times26.9=0.0417\times x$
$9.5495=0.0417x$
$9.5495\div0.0417=0.0417x\div0.0417$
$22\underset\uparrow9.00=x$
Since the digit to the right of the 3rd significant digit is less than 5, round down.
