Finding the Fourth Proportional to 102,699.47, 141,647.18 and 88,383.12

Step by Step Solution

1. Step 1: Write the proportion equation
   102,699.47 : 141,647.18 = 88,383.12 : x
2. Step 2: Convert to fraction form
   102,699.47/141,647.18 = 88,383.12/x
3. Step 3: Cross multiply
   102,699.47x = 141,647.18 × 88,383.12
4. Step 4: Simplify right side
   102,699.47x = 12,519,219,265.69
5. Step 5: Solve for x
   x = 12,519,219,265.69/102,699.47
6. Step 6: Final answer
   x = 121,901.50