To solve the logarithmic equation \( \log_5 x = 4 \), we first convert the logarithmic expression into its exponential form.
The expression \( \log_5 x = 4 \) translates to: \[ x = 5^4 \]
Now, calculate \( 5^4 \): \[ 5^4 = 625 \]
Thus, the solution to the equation \( \log_5 x = 4 \) is: \[ x = 625 \]
Please enter \( 625 \) as your response.