To solve for \( n \) in the equation
\[ 50.3(n + 9.25) = -120.72, \]
we can start by isolating the term involving \( n \). First, divide both sides of the equation by \( 50.3 \):
\[ n + 9.25 = \frac{-120.72}{50.3}. \]
Calculating the right side:
\[ \frac{-120.72}{50.3} \approx -2.3972261. \]
Now we can set this result equal to our equation:
\[ n + 9.25 \approx -2.3972261. \]
Next, we'll isolate \( n \) by subtracting \( 9.25 \) from both sides:
\[ n \approx -2.3972261 - 9.25. \]
Calculating that gives us:
\[ n \approx -11.6472261. \]
Thus, rounding to four decimal places, we have:
\[ n \approx -11.6472. \]
So the solution to the equation is:
\[ \boxed{-11.6472}. \]