#### Answer

True

#### Work Step by Step

To determine if a proportion is true, we have to find if the cross products are equal.
The cross products of $\frac{a}{b}=\frac{c}{d}$ are $a \cdot d$ and $b \cdot c$.
$\frac{6}{7}*5=\frac{10}{7}*3=\frac{30}{7} \rightarrow$ true