Finding the Fourth Proportional to 9,034.74, 12,440.25 and 7,909.38

Step by Step Solution

1. Step 1: Write the proportion equation
   9,034.74 : 12,440.25 = 7,909.38 : x
2. Step 2: Convert to fraction form
   9,034.74/12,440.25 = 7,909.38/x
3. Step 3: Cross multiply
   9,034.74x = 12,440.25 × 7,909.38
4. Step 4: Simplify right side
   9,034.74x = 98,394,664.55
5. Step 5: Solve for x
   x = 98,394,664.55/9,034.74
6. Step 6: Final answer
   x = 10,890.70