Finding the Fourth Proportional to 8,413.15, 12,618.72 and 3,482.20

Step by Step Solution

1. Step 1: Write the proportion equation
   8,413.15 : 12,618.72 = 3,482.20 : x
2. Step 2: Convert to fraction form
   8,413.15/12,618.72 = 3,482.20/x
3. Step 3: Cross multiply
   8,413.15x = 12,618.72 × 3,482.20
4. Step 4: Simplify right side
   8,413.15x = 43,940,906.78
5. Step 5: Solve for x
   x = 43,940,906.78/8,413.15
6. Step 6: Final answer
   x = 5,222.88