Answer
$$x=41.3 .$$
Work Step by Step
To solve the proportion, we put the product of the means equal to the product of the extremes as follows:
$$\frac{x}{19.7}=\frac{144}{68.7}\Longrightarrow x\times 68.7= 19.7\times 144\Longrightarrow x=\frac{ 19.7\times 144}{68.7}=41.293 \approx 41.3$$
