Finding the Fourth Proportional to 3,574.35, 5,355.59 and 3,439.49

Step by Step Solution

1. Step 1: Write the proportion equation
   3,574.35 : 5,355.59 = 3,439.49 : x
2. Step 2: Convert to fraction form
   3,574.35/5,355.59 = 3,439.49/x
3. Step 3: Cross multiply
   3,574.35x = 5,355.59 × 3,439.49
4. Step 4: Simplify right side
   3,574.35x = 18,420,454.27
5. Step 5: Solve for x
   x = 18,420,454.27/3,574.35
6. Step 6: Final answer
   x = 5,153.51