Finding the Fourth Proportional to 103,233.83, 142,469.55 and 57,915

Step by Step Solution

1. Step 1: Write the proportion equation
   103,233.83 : 142,469.55 = 57,915 : x
2. Step 2: Convert to fraction form
   103,233.83/142,469.55 = 57,915/x
3. Step 3: Cross multiply
   103,233.83x = 142,469.55 × 57,915
4. Step 4: Simplify right side
   103,233.83x = 8,251,123,988.25
5. Step 5: Solve for x
   x = 8,251,123,988.25/103,233.83
6. Step 6: Final answer
   x = 79,926.55