Finding the Fourth Proportional to 2,132.86, 3,198.18 and 1,439.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,132.86 : 3,198.18 = 1,439.50 : x
2. Step 2: Convert to fraction form
   2,132.86/3,198.18 = 1,439.50/x
3. Step 3: Cross multiply
   2,132.86x = 3,198.18 × 1,439.50
4. Step 4: Simplify right side
   2,132.86x = 4,603,780.11
5. Step 5: Solve for x
   x = 4,603,780.11/2,132.86
6. Step 6: Final answer
   x = 2,158.50