Finding the Fourth Proportional to 102,685.59, 141,628.10 and 88,369.25

Step by Step Solution

1. Step 1: Write the proportion equation
   102,685.59 : 141,628.10 = 88,369.25 : x
2. Step 2: Convert to fraction form
   102,685.59/141,628.10 = 88,369.25/x
3. Step 3: Cross multiply
   102,685.59x = 141,628.10 × 88,369.25
4. Step 4: Simplify right side
   102,685.59x = 12,515,567,825.94
5. Step 5: Solve for x
   x = 12,515,567,825.94/102,685.59
6. Step 6: Final answer
   x = 121,882.42