Finding the Fourth Proportional to 2,139.42, 2,951.73 and 1,441.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,139.42 : 2,951.73 = 1,441.20 : x
2. Step 2: Convert to fraction form
   2,139.42/2,951.73 = 1,441.20/x
3. Step 3: Cross multiply
   2,139.42x = 2,951.73 × 1,441.20
4. Step 4: Simplify right side
   2,139.42x = 4,254,033.28
5. Step 5: Solve for x
   x = 4,254,033.28/2,139.42
6. Step 6: Final answer
   x = 1,988.40