Finding the Fourth Proportional to 3,361.28, 5,042.72 and 1,021.42

Step by Step Solution

1. Step 1: Write the proportion equation
   3,361.28 : 5,042.72 = 1,021.42 : x
2. Step 2: Convert to fraction form
   3,361.28/5,042.72 = 1,021.42/x
3. Step 3: Cross multiply
   3,361.28x = 5,042.72 × 1,021.42
4. Step 4: Simplify right side
   3,361.28x = 5,150,721.18
5. Step 5: Solve for x
   x = 5,150,721.18/3,361.28
6. Step 6: Final answer
   x = 1,532.37