Finding the Fourth Proportional to 102,580.52, 141,560.56 and 57,255.88

Step by Step Solution

1. Step 1: Write the proportion equation
   102,580.52 : 141,560.56 = 57,255.88 : x
2. Step 2: Convert to fraction form
   102,580.52/141,560.56 = 57,255.88/x
3. Step 3: Cross multiply
   102,580.52x = 141,560.56 × 57,255.88
4. Step 4: Simplify right side
   102,580.52x = 8,105,174,436.09
5. Step 5: Solve for x
   x = 8,105,174,436.09/102,580.52
6. Step 6: Final answer
   x = 79,012.80