Finding the Fourth Proportional to 11,399.46, 15,718.86 and 7,413.18

Step by Step Solution

1. Step 1: Write the proportion equation
   11,399.46 : 15,718.86 = 7,413.18 : x
2. Step 2: Convert to fraction form
   11,399.46/15,718.86 = 7,413.18/x
3. Step 3: Cross multiply
   11,399.46x = 15,718.86 × 7,413.18
4. Step 4: Simplify right side
   11,399.46x = 116,526,738.57
5. Step 5: Solve for x
   x = 116,526,738.57/11,399.46
6. Step 6: Final answer
   x = 10,222.13