x : 7:15 = 15/23

To solve the proportion \( \frac{x}{7.15} = \frac{15}{23} \), we can use cross-multiplication.

Cross-multiply to get:

\[ x \cdot 23 = 7.15 \cdot 15 \]

Now calculate \( 7.15 \cdot 15 \):

\[ 7.15 \cdot 15 = 107.25 \]

This gives us:

\[ 23x = 107.25 \]

Now, solve for \( x \) by dividing both sides by 23:

\[ x = \frac{107.25}{23} \]

Now, calculate \( \frac{107.25}{23} \):

\[ x \approx 4.66 \]

So, \( x \approx 4.66 \).