Finding the Fourth Proportional to 12,665.41, 17,462.01 and 8,679.60

Step by Step Solution

1. Step 1: Write the proportion equation
   12,665.41 : 17,462.01 = 8,679.60 : x
2. Step 2: Convert to fraction form
   12,665.41/17,462.01 = 8,679.60/x
3. Step 3: Cross multiply
   12,665.41x = 17,462.01 × 8,679.60
4. Step 4: Simplify right side
   12,665.41x = 151,563,262.00
5. Step 5: Solve for x
   x = 151,563,262.00/12,665.41
6. Step 6: Final answer
   x = 11,966.71