Finding the Fourth Proportional to 12,104.72, 18,162.88 and 4,317.20

Step by Step Solution

1. Step 1: Write the proportion equation
   12,104.72 : 18,162.88 = 4,317.20 : x
2. Step 2: Convert to fraction form
   12,104.72/18,162.88 = 4,317.20/x
3. Step 3: Cross multiply
   12,104.72x = 18,162.88 × 4,317.20
4. Step 4: Simplify right side
   12,104.72x = 78,412,785.54
5. Step 5: Solve for x
   x = 78,412,785.54/12,104.72
6. Step 6: Final answer
   x = 6,477.87