Finding the Fourth Proportional to 12,355.20, 17,044.72 and 9,710.29

Step by Step Solution

1. Step 1: Write the proportion equation
   12,355.20 : 17,044.72 = 9,710.29 : x
2. Step 2: Convert to fraction form
   12,355.20/17,044.72 = 9,710.29/x
3. Step 3: Cross multiply
   12,355.20x = 17,044.72 × 9,710.29
4. Step 4: Simplify right side
   12,355.20x = 165,509,174.17
5. Step 5: Solve for x
   x = 165,509,174.17/12,355.20
6. Step 6: Final answer
   x = 13,395.91