Finding the Fourth Proportional to 87,691.38, 131,538.69 and 28,526.82

Step by Step Solution

1. Step 1: Write the proportion equation
   87,691.38 : 131,538.69 = 28,526.82 : x
2. Step 2: Convert to fraction form
   87,691.38/131,538.69 = 28,526.82/x
3. Step 3: Cross multiply
   87,691.38x = 131,538.69 × 28,526.82
4. Step 4: Simplify right side
   87,691.38x = 3,752,380,532.67
5. Step 5: Solve for x
   x = 3,752,380,532.67/87,691.38
6. Step 6: Final answer
   x = 42,790.76