Finding the Fourth Proportional to 123,760.88, 185,611.58 and 57,137.00

Step by Step Solution

1. Step 1: Write the proportion equation
   123,760.88 : 185,611.58 = 57,137.00 : x
2. Step 2: Convert to fraction form
   123,760.88/185,611.58 = 57,137.00/x
3. Step 3: Cross multiply
   123,760.88x = 185,611.58 × 57,137.00
4. Step 4: Simplify right side
   123,760.88x = 10,605,287,632.72
5. Step 5: Solve for x
   x = 10,605,287,632.72/123,760.88
6. Step 6: Final answer
   x = 85,691.76