Finding the Fourth Proportional to 9,711.12, 13,402.46 and 5,404.64

Step by Step Solution

1. Step 1: Write the proportion equation
   9,711.12 : 13,402.46 = 5,404.64 : x
2. Step 2: Convert to fraction form
   9,711.12/13,402.46 = 5,404.64/x
3. Step 3: Cross multiply
   9,711.12x = 13,402.46 × 5,404.64
4. Step 4: Simplify right side
   9,711.12x = 72,435,471.41
5. Step 5: Solve for x
   x = 72,435,471.41/9,711.12
6. Step 6: Final answer
   x = 7,459.02