Finding the Fourth Proportional to 9,660.69, 13,331.80 and 5,411.89

Step by Step Solution

1. Step 1: Write the proportion equation
   9,660.69 : 13,331.80 = 5,411.89 : x
2. Step 2: Convert to fraction form
   9,660.69/13,331.80 = 5,411.89/x
3. Step 3: Cross multiply
   9,660.69x = 13,331.80 × 5,411.89
4. Step 4: Simplify right side
   9,660.69x = 72,150,235.10
5. Step 5: Solve for x
   x = 72,150,235.10/9,660.69
6. Step 6: Final answer
   x = 7,468.44