1. **Problem:** Find the square root of 3721. 2. **Formula:** The square root of a number $a$ is a number $b$ such that $$b^2 = a$$. 3. **Step:** To find $\sqrt{3721}$, we look for a number whose square is 3721. 4. **Calculation:** Checking perfect squares near 3721, $61^2 = 3721$. 5. **Answer:** Therefore, $$\sqrt{3721} = 61$$.