Finding the Fourth Proportional to 87,663, 131,511.78 and 28,500.12

Step by Step Solution

1. Step 1: Write the proportion equation
   87,663 : 131,511.78 = 28,500.12 : x
2. Step 2: Convert to fraction form
   87,663/131,511.78 = 28,500.12/x
3. Step 3: Cross multiply
   87,663x = 131,511.78 × 28,500.12
4. Step 4: Simplify right side
   87,663x = 3,748,101,511.41
5. Step 5: Solve for x
   x = 3,748,101,511.41/87,663
6. Step 6: Final answer
   x = 42,755.80