Finding the Fourth Proportional to 12,287.72, 18,413.04 and 5,706.20

Step by Step Solution

1. Step 1: Write the proportion equation
   12,287.72 : 18,413.04 = 5,706.20 : x
2. Step 2: Convert to fraction form
   12,287.72/18,413.04 = 5,706.20/x
3. Step 3: Cross multiply
   12,287.72x = 18,413.04 × 5,706.20
4. Step 4: Simplify right side
   12,287.72x = 105,068,488.85
5. Step 5: Solve for x
   x = 105,068,488.85/12,287.72
6. Step 6: Final answer
   x = 8,550.69