Finding the Third Proportional to 54,915.75 and 82,156.50

Step by Step Solution

1. Step 1: Write the proportion equation
   54,915.75 : 82,156.50 = 82,156.50 : x
2. Step 2: Convert to fraction form
   54,915.75/82,156.50 = 82,156.50/x
3. Step 3: Cross multiply
   54,915.75x = 82,156.50 × 82,156.50
4. Step 4: Simplify right side
   54,915.75x = 6,749,690,492.25
5. Step 5: Solve for x
   x = 6,749,690,492.25/54,915.75
6. Step 6: Final answer
   x = 122,909.92