Finding the Fourth Proportional to 12,028.97, 18,042.89 and 3,144.31

Step by Step Solution

1. Step 1: Write the proportion equation
   12,028.97 : 18,042.89 = 3,144.31 : x
2. Step 2: Convert to fraction form
   12,028.97/18,042.89 = 3,144.31/x
3. Step 3: Cross multiply
   12,028.97x = 18,042.89 × 3,144.31
4. Step 4: Simplify right side
   12,028.97x = 56,732,357.10
5. Step 5: Solve for x
   x = 56,732,357.10/12,028.97
6. Step 6: Final answer
   x = 4,716.31