Finding the Third Proportional to 39,712.50 and 55,545.75

Step by Step Solution

1. Step 1: Write the proportion equation
   39,712.50 : 55,545.75 = 55,545.75 : x
2. Step 2: Convert to fraction form
   39,712.50/55,545.75 = 55,545.75/x
3. Step 3: Cross multiply
   39,712.50x = 55,545.75 × 55,545.75
4. Step 4: Simplify right side
   39,712.50x = 3,085,330,343.06
5. Step 5: Solve for x
   x = 3,085,330,343.06/39,712.50
6. Step 6: Final answer
   x = 77,691.67