Finding the Third Proportional to 39,639.38 and 54,356.06

Step by Step Solution

1. Step 1: Write the proportion equation
   39,639.38 : 54,356.06 = 54,356.06 : x
2. Step 2: Convert to fraction form
   39,639.38/54,356.06 = 54,356.06/x
3. Step 3: Cross multiply
   39,639.38x = 54,356.06 × 54,356.06
4. Step 4: Simplify right side
   39,639.38x = 2,954,581,530.50
5. Step 5: Solve for x
   x = 2,954,581,530.50/39,639.38
6. Step 6: Final answer
   x = 74,536.53