Finding the Fourth Proportional to 3,948.21, 5,443.81 and 3,149.04

Step by Step Solution

1. Step 1: Write the proportion equation
   3,948.21 : 5,443.81 = 3,149.04 : x
2. Step 2: Convert to fraction form
   3,948.21/5,443.81 = 3,149.04/x
3. Step 3: Cross multiply
   3,948.21x = 5,443.81 × 3,149.04
4. Step 4: Simplify right side
   3,948.21x = 17,142,787.98
5. Step 5: Solve for x
   x = 17,142,787.98/3,948.21
6. Step 6: Final answer
   x = 4,341.91