Finding the Fourth Proportional to 103,435.88, 142,743.41 and 57,499.83

Step by Step Solution

1. Step 1: Write the proportion equation
   103,435.88 : 142,743.41 = 57,499.83 : x
2. Step 2: Convert to fraction form
   103,435.88/142,743.41 = 57,499.83/x
3. Step 3: Cross multiply
   103,435.88x = 142,743.41 × 57,499.83
4. Step 4: Simplify right side
   103,435.88x = 8,207,721,521.12
5. Step 5: Solve for x
   x = 8,207,721,521.12/103,435.88
6. Step 6: Final answer
   x = 79,350.82