Finding the Fourth Proportional to 12,025.22, 18,038.72 and 4,128.32

Step by Step Solution

1. Step 1: Write the proportion equation
   12,025.22 : 18,038.72 = 4,128.32 : x
2. Step 2: Convert to fraction form
   12,025.22/18,038.72 = 4,128.32/x
3. Step 3: Cross multiply
   12,025.22x = 18,038.72 × 4,128.32
4. Step 4: Simplify right side
   12,025.22x = 74,469,608.55
5. Step 5: Solve for x
   x = 74,469,608.55/12,025.22
6. Step 6: Final answer
   x = 6,192.79