Finding the Fourth Proportional to 9,168.75, 12,648.96 and 7,040.61

Step by Step Solution

1. Step 1: Write the proportion equation
   9,168.75 : 12,648.96 = 7,040.61 : x
2. Step 2: Convert to fraction form
   9,168.75/12,648.96 = 7,040.61/x
3. Step 3: Cross multiply
   9,168.75x = 12,648.96 × 7,040.61
4. Step 4: Simplify right side
   9,168.75x = 89,056,394.27
5. Step 5: Solve for x
   x = 89,056,394.27/9,168.75
6. Step 6: Final answer
   x = 9,713.04