Finding the Fourth Proportional to 12,091.92, 18,143.46 and 5,520.12

Step by Step Solution

1. Step 1: Write the proportion equation
   12,091.92 : 18,143.46 = 5,520.12 : x
2. Step 2: Convert to fraction form
   12,091.92/18,143.46 = 5,520.12/x
3. Step 3: Cross multiply
   12,091.92x = 18,143.46 × 5,520.12
4. Step 4: Simplify right side
   12,091.92x = 100,154,076.42
5. Step 5: Solve for x
   x = 100,154,076.42/12,091.92
6. Step 6: Final answer
   x = 8,282.73