Finding the Fourth Proportional to 8,413.69, 12,621.89 and 2,569.81

Step by Step Solution

1. Step 1: Write the proportion equation
   8,413.69 : 12,621.89 = 2,569.81 : x
2. Step 2: Convert to fraction form
   8,413.69/12,621.89 = 2,569.81/x
3. Step 3: Cross multiply
   8,413.69x = 12,621.89 × 2,569.81
4. Step 4: Simplify right side
   8,413.69x = 32,435,859.14
5. Step 5: Solve for x
   x = 32,435,859.14/8,413.69
6. Step 6: Final answer
   x = 3,855.13