Finding the Fourth Proportional to 11,665.66, 17,479.01 and 8,196.70

Step by Step Solution

1. Step 1: Write the proportion equation
   11,665.66 : 17,479.01 = 8,196.70 : x
2. Step 2: Convert to fraction form
   11,665.66/17,479.01 = 8,196.70/x
3. Step 3: Cross multiply
   11,665.66x = 17,479.01 × 8,196.70
4. Step 4: Simplify right side
   11,665.66x = 143,270,201.27
5. Step 5: Solve for x
   x = 143,270,201.27/11,665.66
6. Step 6: Final answer
   x = 12,281.36