To solve the exponential equation \( 5^x = 625 \), we can express 625 as a power of 5.
We know that:
\[ 625 = 5^4 \]
Now we can rewrite the equation:
\[ 5^x = 5^4 \]
Since the bases are the same, we can set the exponents equal to each other:
\[ x = 4 \]
Thus, the value of \( x \) that makes the equation true is:
x=4