Finding the Fourth Proportional to 12,105.20, 18,159.88 and 3,785.04

Step by Step Solution

1. Step 1: Write the proportion equation
   12,105.20 : 18,159.88 = 3,785.04 : x
2. Step 2: Convert to fraction form
   12,105.20/18,159.88 = 3,785.04/x
3. Step 3: Cross multiply
   12,105.20x = 18,159.88 × 3,785.04
4. Step 4: Simplify right side
   12,105.20x = 68,735,872.20
5. Step 5: Solve for x
   x = 68,735,872.20/12,105.20
6. Step 6: Final answer
   x = 5,678.21