Finding the Fourth Proportional to 87,984.10, 131,976.15 and 82,915.30

Step by Step Solution

1. Step 1: Write the proportion equation
   87,984.10 : 131,976.15 = 82,915.30 : x
2. Step 2: Convert to fraction form
   87,984.10/131,976.15 = 82,915.30/x
3. Step 3: Cross multiply
   87,984.10x = 131,976.15 × 82,915.30
4. Step 4: Simplify right side
   87,984.10x = 10,942,842,070.10
5. Step 5: Solve for x
   x = 10,942,842,070.10/87,984.10
6. Step 6: Final answer
   x = 124,372.95