Finding the Fourth Proportional to 10,434.78, 14,406.72 and 9,313.83

Step by Step Solution

1. Step 1: Write the proportion equation
   10,434.78 : 14,406.72 = 9,313.83 : x
2. Step 2: Convert to fraction form
   10,434.78/14,406.72 = 9,313.83/x
3. Step 3: Cross multiply
   10,434.78x = 14,406.72 × 9,313.83
4. Step 4: Simplify right side
   10,434.78x = 134,181,740.94
5. Step 5: Solve for x
   x = 134,181,740.94/10,434.78
6. Step 6: Final answer
   x = 12,859.09