Finding the Third Proportional to 54,381.38 and 81,906.19

Step by Step Solution

1. Step 1: Write the proportion equation
   54,381.38 : 81,906.19 = 81,906.19 : x
2. Step 2: Convert to fraction form
   54,381.38/81,906.19 = 81,906.19/x
3. Step 3: Cross multiply
   54,381.38x = 81,906.19 × 81,906.19
4. Step 4: Simplify right side
   54,381.38x = 6,708,623,550.79
5. Step 5: Solve for x
   x = 6,708,623,550.79/54,381.38
6. Step 6: Final answer
   x = 123,362.52