Finding the Fourth Proportional to 9,951.55, 13,733.21 and 5,475.20

Step by Step Solution

1. Step 1: Write the proportion equation
   9,951.55 : 13,733.21 = 5,475.20 : x
2. Step 2: Convert to fraction form
   9,951.55/13,733.21 = 5,475.20/x
3. Step 3: Cross multiply
   9,951.55x = 13,733.21 × 5,475.20
4. Step 4: Simplify right side
   9,951.55x = 75,192,016.41
5. Step 5: Solve for x
   x = 75,192,016.41/9,951.55
6. Step 6: Final answer
   x = 7,555.81