Finding the Fourth Proportional to 9,663.30, 13,335.30 and 5,471.55

Step by Step Solution

1. Step 1: Write the proportion equation
   9,663.30 : 13,335.30 = 5,471.55 : x
2. Step 2: Convert to fraction form
   9,663.30/13,335.30 = 5,471.55/x
3. Step 3: Cross multiply
   9,663.30x = 13,335.30 × 5,471.55
4. Step 4: Simplify right side
   9,663.30x = 72,964,760.72
5. Step 5: Solve for x
   x = 72,964,760.72/9,663.30
6. Step 6: Final answer
   x = 7,550.71