Finding the Fourth Proportional to 2,132.88, 3,198.16 and 1,439.52

Step by Step Solution

1. Step 1: Write the proportion equation
   2,132.88 : 3,198.16 = 1,439.52 : x
2. Step 2: Convert to fraction form
   2,132.88/3,198.16 = 1,439.52/x
3. Step 3: Cross multiply
   2,132.88x = 3,198.16 × 1,439.52
4. Step 4: Simplify right side
   2,132.88x = 4,603,815.28
5. Step 5: Solve for x
   x = 4,603,815.28/2,132.88
6. Step 6: Final answer
   x = 2,158.50