Finding the Fourth Proportional to 8,999.28, 12,413.82 and 5,411.74

Step by Step Solution

1. Step 1: Write the proportion equation
   8,999.28 : 12,413.82 = 5,411.74 : x
2. Step 2: Convert to fraction form
   8,999.28/12,413.82 = 5,411.74/x
3. Step 3: Cross multiply
   8,999.28x = 12,413.82 × 5,411.74
4. Step 4: Simplify right side
   8,999.28x = 67,180,366.25
5. Step 5: Solve for x
   x = 67,180,366.25/8,999.28
6. Step 6: Final answer
   x = 7,465.08