Finding the Fourth Proportional to 87,490.54, 131,256.72 and 28,326.28

Step by Step Solution

1. Step 1: Write the proportion equation
   87,490.54 : 131,256.72 = 28,326.28 : x
2. Step 2: Convert to fraction form
   87,490.54/131,256.72 = 28,326.28/x
3. Step 3: Cross multiply
   87,490.54x = 131,256.72 × 28,326.28
4. Step 4: Simplify right side
   87,490.54x = 3,718,013,804.69
5. Step 5: Solve for x
   x = 3,718,013,804.69/87,490.54
6. Step 6: Final answer
   x = 42,496.18