Finding the Fourth Proportional to 11,665.41, 17,478.63 and 8,196.45

Step by Step Solution

1. Step 1: Write the proportion equation
   11,665.41 : 17,478.63 = 8,196.45 : x
2. Step 2: Convert to fraction form
   11,665.41/17,478.63 = 8,196.45/x
3. Step 3: Cross multiply
   11,665.41x = 17,478.63 × 8,196.45
4. Step 4: Simplify right side
   11,665.41x = 143,262,716.86
5. Step 5: Solve for x
   x = 143,262,716.86/11,665.41
6. Step 6: Final answer
   x = 12,280.98