Finding the Fourth Proportional to 9,435.36, 14,131.17 and 9,107.31

Step by Step Solution

1. Step 1: Write the proportion equation
   9,435.36 : 14,131.17 = 9,107.31 : x
2. Step 2: Convert to fraction form
   9,435.36/14,131.17 = 9,107.31/x
3. Step 3: Cross multiply
   9,435.36x = 14,131.17 × 9,107.31
4. Step 4: Simplify right side
   9,435.36x = 128,696,945.85
5. Step 5: Solve for x
   x = 128,696,945.85/9,435.36
6. Step 6: Final answer
   x = 13,639.86