Finding the Fourth Proportional to 3,928.50, 5,418.90 and 3,144.42

Step by Step Solution

1. Step 1: Write the proportion equation
   3,928.50 : 5,418.90 = 3,144.42 : x
2. Step 2: Convert to fraction form
   3,928.50/5,418.90 = 3,144.42/x
3. Step 3: Cross multiply
   3,928.50x = 5,418.90 × 3,144.42
4. Step 4: Simplify right side
   3,928.50x = 17,039,297.54
5. Step 5: Solve for x
   x = 17,039,297.54/3,928.50
6. Step 6: Final answer
   x = 4,337.35