Finding the Fourth Proportional to 98,142.30, 135,419.99 and 57,850.61

Step by Step Solution

1. Step 1: Write the proportion equation
   98,142.30 : 135,419.99 = 57,850.61 : x
2. Step 2: Convert to fraction form
   98,142.30/135,419.99 = 57,850.61/x
3. Step 3: Cross multiply
   98,142.30x = 135,419.99 × 57,850.61
4. Step 4: Simplify right side
   98,142.30x = 7,834,128,061.34
5. Step 5: Solve for x
   x = 7,834,128,061.34/98,142.30
6. Step 6: Final answer
   x = 79,824.17