Finding the Fourth Proportional to 12,105.36, 18,150.48 and 3,782.88

Step by Step Solution

1. Step 1: Write the proportion equation
   12,105.36 : 18,150.48 = 3,782.88 : x
2. Step 2: Convert to fraction form
   12,105.36/18,150.48 = 3,782.88/x
3. Step 3: Cross multiply
   12,105.36x = 18,150.48 × 3,782.88
4. Step 4: Simplify right side
   12,105.36x = 68,661,087.78
5. Step 5: Solve for x
   x = 68,661,087.78/12,105.36
6. Step 6: Final answer
   x = 5,671.96