Finding the Fourth Proportional to 8,287.92, 12,422.16 and 7,413.12

Step by Step Solution

1. Step 1: Write the proportion equation
   8,287.92 : 12,422.16 = 7,413.12 : x
2. Step 2: Convert to fraction form
   8,287.92/12,422.16 = 7,413.12/x
3. Step 3: Cross multiply
   8,287.92x = 12,422.16 × 7,413.12
4. Step 4: Simplify right side
   8,287.92x = 92,086,962.74
5. Step 5: Solve for x
   x = 92,086,962.74/8,287.92
6. Step 6: Final answer
   x = 11,110.99