Finding the Fourth Proportional to 10,429.66, 14,399.58 and 9,308.62

Step by Step Solution

1. Step 1: Write the proportion equation
   10,429.66 : 14,399.58 = 9,308.62 : x
2. Step 2: Convert to fraction form
   10,429.66/14,399.58 = 9,308.62/x
3. Step 3: Cross multiply
   10,429.66x = 14,399.58 × 9,308.62
4. Step 4: Simplify right side
   10,429.66x = 134,040,218.38
5. Step 5: Solve for x
   x = 134,040,218.38/10,429.66
6. Step 6: Final answer
   x = 12,851.83