Finding the Fourth Proportional to 12,443.96, 17,167.74 and 8,666.12

Step by Step Solution

1. Step 1: Write the proportion equation
   12,443.96 : 17,167.74 = 8,666.12 : x
2. Step 2: Convert to fraction form
   12,443.96/17,167.74 = 8,666.12/x
3. Step 3: Cross multiply
   12,443.96x = 17,167.74 × 8,666.12
4. Step 4: Simplify right side
   12,443.96x = 148,777,694.97
5. Step 5: Solve for x
   x = 148,777,694.97/12,443.96
6. Step 6: Final answer
   x = 11,955.82