Finding the Fourth Proportional to 11,665.40, 17,478.60 and 8,196.44

Step by Step Solution

1. Step 1: Write the proportion equation
   11,665.40 : 17,478.60 = 8,196.44 : x
2. Step 2: Convert to fraction form
   11,665.40/17,478.60 = 8,196.44/x
3. Step 3: Cross multiply
   11,665.40x = 17,478.60 × 8,196.44
4. Step 4: Simplify right side
   11,665.40x = 143,262,296.18
5. Step 5: Solve for x
   x = 143,262,296.18/11,665.40
6. Step 6: Final answer
   x = 12,280.96