Finding the Fourth Proportional to 59,732.78, 89,540.43 and 28,560.74

Step by Step Solution

1. Step 1: Write the proportion equation
   59,732.78 : 89,540.43 = 28,560.74 : x
2. Step 2: Convert to fraction form
   59,732.78/89,540.43 = 28,560.74/x
3. Step 3: Cross multiply
   59,732.78x = 89,540.43 × 28,560.74
4. Step 4: Simplify right side
   59,732.78x = 2,557,340,940.72
5. Step 5: Solve for x
   x = 2,557,340,940.72/59,732.78
6. Step 6: Final answer
   x = 42,813.02