Finding the Fourth Proportional to 12,442.40, 17,442.40 and 12,442.40

Step by Step Solution

1. Step 1: Write the proportion equation
   12,442.40 : 17,442.40 = 12,442.40 : x
2. Step 2: Convert to fraction form
   12,442.40/17,442.40 = 12,442.40/x
3. Step 3: Cross multiply
   12,442.40x = 17,442.40 × 12,442.40
4. Step 4: Simplify right side
   12,442.40x = 217,025,317.76
5. Step 5: Solve for x
   x = 217,025,317.76/12,442.40
6. Step 6: Final answer
   x = 17,442.40