Finding the Fourth Proportional to 13,166.17, 18,167.56 and 8,456.83

Step by Step Solution

1. Step 1: Write the proportion equation
   13,166.17 : 18,167.56 = 8,456.83 : x
2. Step 2: Convert to fraction form
   13,166.17/18,167.56 = 8,456.83/x
3. Step 3: Cross multiply
   13,166.17x = 18,167.56 × 8,456.83
4. Step 4: Simplify right side
   13,166.17x = 153,639,966.43
5. Step 5: Solve for x
   x = 153,639,966.43/13,166.17
6. Step 6: Final answer
   x = 11,669.30