Change the logarithmic equation to an equivalent equation involving an exponent. \[ \ln x=18 \] The equivalent exponential equation is $\square$.

Step 1 ：Change the logarithmic equation to an equivalent equation involving an exponent. The equation is \(\ln x=18\).

Step 2 ：The equivalent exponential equation is \(e^{18} = x\).

Step 3 ：Calculate the value of \(x\).

Step 4 ：Using a calculator, we find that \(x \approx 65659969.13733051\).

Step 5 ：Final Answer: \(\boxed{65659969.13733051}\)