Finding the Fourth Proportional to 9,660.42, 13,331.88 and 5,411.23

Step by Step Solution

1. Step 1: Write the proportion equation
   9,660.42 : 13,331.88 = 5,411.23 : x
2. Step 2: Convert to fraction form
   9,660.42/13,331.88 = 5,411.23/x
3. Step 3: Cross multiply
   9,660.42x = 13,331.88 × 5,411.23
4. Step 4: Simplify right side
   9,660.42x = 72,141,775.30
5. Step 5: Solve for x
   x = 72,141,775.30/9,660.42
6. Step 6: Final answer
   x = 7,467.77