Finding the Fourth Proportional to 12,394.31, 17,118.35 and 8,164.29

Step by Step Solution

1. Step 1: Write the proportion equation
   12,394.31 : 17,118.35 = 8,164.29 : x
2. Step 2: Convert to fraction form
   12,394.31/17,118.35 = 8,164.29/x
3. Step 3: Cross multiply
   12,394.31x = 17,118.35 × 8,164.29
4. Step 4: Simplify right side
   12,394.31x = 139,759,132.90
5. Step 5: Solve for x
   x = 139,759,132.90/12,394.31
6. Step 6: Final answer
   x = 11,276.08