Finding the Fourth Proportional to 9,399.74, 12,980.92 and 7,407.14

Step by Step Solution

1. Step 1: Write the proportion equation
   9,399.74 : 12,980.92 = 7,407.14 : x
2. Step 2: Convert to fraction form
   9,399.74/12,980.92 = 7,407.14/x
3. Step 3: Cross multiply
   9,399.74x = 12,980.92 × 7,407.14
4. Step 4: Simplify right side
   9,399.74x = 96,151,491.77
5. Step 5: Solve for x
   x = 96,151,491.77/9,399.74
6. Step 6: Final answer
   x = 10,229.17