Finding the Fourth Proportional to 11,233.92, 15,516.60 and 8,413.89

Step by Step Solution

1. Step 1: Write the proportion equation
   11,233.92 : 15,516.60 = 8,413.89 : x
2. Step 2: Convert to fraction form
   11,233.92/15,516.60 = 8,413.89/x
3. Step 3: Cross multiply
   11,233.92x = 15,516.60 × 8,413.89
4. Step 4: Simplify right side
   11,233.92x = 130,554,965.57
5. Step 5: Solve for x
   x = 130,554,965.57/11,233.92
6. Step 6: Final answer
   x = 11,621.50