Finding the Fourth Proportional to 103,087.30, 142,329 and 79,171.24

Step by Step Solution

1. Step 1: Write the proportion equation
   103,087.30 : 142,329 = 79,171.24 : x
2. Step 2: Convert to fraction form
   103,087.30/142,329 = 79,171.24/x
3. Step 3: Cross multiply
   103,087.30x = 142,329 × 79,171.24
4. Step 4: Simplify right side
   103,087.30x = 11,268,363,417.96
5. Step 5: Solve for x
   x = 11,268,363,417.96/103,087.30
6. Step 6: Final answer
   x = 109,308.94