Finding the Fourth Proportional to 87,758.31, 131,612.34 and 28,599.15

Step by Step Solution

1. Step 1: Write the proportion equation
   87,758.31 : 131,612.34 = 28,599.15 : x
2. Step 2: Convert to fraction form
   87,758.31/131,612.34 = 28,599.15/x
3. Step 3: Cross multiply
   87,758.31x = 131,612.34 × 28,599.15
4. Step 4: Simplify right side
   87,758.31x = 3,764,001,053.51
5. Step 5: Solve for x
   x = 3,764,001,053.51/87,758.31
6. Step 6: Final answer
   x = 42,890.54