Finding the Fourth Proportional to 8,414.40, 12,568.56 and 8,181.12

Step by Step Solution

1. Step 1: Write the proportion equation
   8,414.40 : 12,568.56 = 8,181.12 : x
2. Step 2: Convert to fraction form
   8,414.40/12,568.56 = 8,181.12/x
3. Step 3: Cross multiply
   8,414.40x = 12,568.56 × 8,181.12
4. Step 4: Simplify right side
   8,414.40x = 102,824,897.59
5. Step 5: Solve for x
   x = 102,824,897.59/8,414.40
6. Step 6: Final answer
   x = 12,220.11