Finding the Fourth Proportional to 12,395.31, 17,119.73 and 8,165.29

Step by Step Solution

1. Step 1: Write the proportion equation
   12,395.31 : 17,119.73 = 8,165.29 : x
2. Step 2: Convert to fraction form
   12,395.31/17,119.73 = 8,165.29/x
3. Step 3: Cross multiply
   12,395.31x = 17,119.73 × 8,165.29
4. Step 4: Simplify right side
   12,395.31x = 139,787,560.17
5. Step 5: Solve for x
   x = 139,787,560.17/12,395.31
6. Step 6: Final answer
   x = 11,277.46