Finding the Fourth Proportional to 8,769.84, 12,104.82 and 5,413.20

Step by Step Solution

1. Step 1: Write the proportion equation
   8,769.84 : 12,104.82 = 5,413.20 : x
2. Step 2: Convert to fraction form
   8,769.84/12,104.82 = 5,413.20/x
3. Step 3: Cross multiply
   8,769.84x = 12,104.82 × 5,413.20
4. Step 4: Simplify right side
   8,769.84x = 65,525,811.62
5. Step 5: Solve for x
   x = 65,525,811.62/8,769.84
6. Step 6: Final answer
   x = 7,471.72