Finding the Fourth Proportional to 9,655.54, 13,321.53 and 5,405.96

Step by Step Solution

1. Step 1: Write the proportion equation
   9,655.54 : 13,321.53 = 5,405.96 : x
2. Step 2: Convert to fraction form
   9,655.54/13,321.53 = 5,405.96/x
3. Step 3: Cross multiply
   9,655.54x = 13,321.53 × 5,405.96
4. Step 4: Simplify right side
   9,655.54x = 72,015,691.62
5. Step 5: Solve for x
   x = 72,015,691.62/9,655.54
6. Step 6: Final answer
   x = 7,458.49