Finding the Fourth Proportional to 9,451.72, 13,040.40 and 5,471.80

Step by Step Solution

1. Step 1: Write the proportion equation
   9,451.72 : 13,040.40 = 5,471.80 : x
2. Step 2: Convert to fraction form
   9,451.72/13,040.40 = 5,471.80/x
3. Step 3: Cross multiply
   9,451.72x = 13,040.40 × 5,471.80
4. Step 4: Simplify right side
   9,451.72x = 71,354,460.72
5. Step 5: Solve for x
   x = 71,354,460.72/9,451.72
6. Step 6: Final answer
   x = 7,549.36