Finding the Fourth Proportional to 89,143.31, 133,413.57 and 86,744.46

Step by Step Solution

1. Step 1: Write the proportion equation
   89,143.31 : 133,413.57 = 86,744.46 : x
2. Step 2: Convert to fraction form
   89,143.31/133,413.57 = 86,744.46/x
3. Step 3: Cross multiply
   89,143.31x = 133,413.57 × 86,744.46
4. Step 4: Simplify right side
   89,143.31x = 11,572,888,086.32
5. Step 5: Solve for x
   x = 11,572,888,086.32/89,143.31
6. Step 6: Final answer
   x = 129,823.41