Finding the Third Proportional to 39,639.38 and 57,727.69

Step by Step Solution

1. Step 1: Write the proportion equation
   39,639.38 : 57,727.69 = 57,727.69 : x
2. Step 2: Convert to fraction form
   39,639.38/57,727.69 = 57,727.69/x
3. Step 3: Cross multiply
   39,639.38x = 57,727.69 × 57,727.69
4. Step 4: Simplify right side
   39,639.38x = 3,332,485,904.10
5. Step 5: Solve for x
   x = 3,332,485,904.10/39,639.38
6. Step 6: Final answer
   x = 84,070.09