Finding the Third Proportional to 56,387.25 and 81,915.75

Step by Step Solution

1. Step 1: Write the proportion equation
   56,387.25 : 81,915.75 = 81,915.75 : x
2. Step 2: Convert to fraction form
   56,387.25/81,915.75 = 81,915.75/x
3. Step 3: Cross multiply
   56,387.25x = 81,915.75 × 81,915.75
4. Step 4: Simplify right side
   56,387.25x = 6,710,190,098.06
5. Step 5: Solve for x
   x = 6,710,190,098.06/56,387.25
6. Step 6: Final answer
   x = 119,001.90