Finding the Fourth Proportional to 12,105.16, 18,162.16 and 3,785.78

Step by Step Solution

1. Step 1: Write the proportion equation
   12,105.16 : 18,162.16 = 3,785.78 : x
2. Step 2: Convert to fraction form
   12,105.16/18,162.16 = 3,785.78/x
3. Step 3: Cross multiply
   12,105.16x = 18,162.16 × 3,785.78
4. Step 4: Simplify right side
   12,105.16x = 68,757,942.08
5. Step 5: Solve for x
   x = 68,757,942.08/12,105.16
6. Step 6: Final answer
   x = 5,680.05