Finding the Fourth Proportional to 11,665.90, 17,479.41 and 8,196.94

Step by Step Solution

1. Step 1: Write the proportion equation
   11,665.90 : 17,479.41 = 8,196.94 : x
2. Step 2: Convert to fraction form
   11,665.90/17,479.41 = 8,196.94/x
3. Step 3: Cross multiply
   11,665.90x = 17,479.41 × 8,196.94
4. Step 4: Simplify right side
   11,665.90x = 143,277,675.01
5. Step 5: Solve for x
   x = 143,277,675.01/11,665.90
6. Step 6: Final answer
   x = 12,281.75