Finding the Fourth Proportional to 59,813.76, 89,720.78 and 56,160.12

Step by Step Solution

1. Step 1: Write the proportion equation
   59,813.76 : 89,720.78 = 56,160.12 : x
2. Step 2: Convert to fraction form
   59,813.76/89,720.78 = 56,160.12/x
3. Step 3: Cross multiply
   59,813.76x = 89,720.78 × 56,160.12
4. Step 4: Simplify right side
   59,813.76x = 5,038,729,771.29
5. Step 5: Solve for x
   x = 5,038,729,771.29/59,813.76
6. Step 6: Final answer
   x = 84,240.31