Finding the Fourth Proportional to 2,059.60, 3,082.20 and 1,440.40

Step by Step Solution

1. Step 1: Write the proportion equation
   2,059.60 : 3,082.20 = 1,440.40 : x
2. Step 2: Convert to fraction form
   2,059.60/3,082.20 = 1,440.40/x
3. Step 3: Cross multiply
   2,059.60x = 3,082.20 × 1,440.40
4. Step 4: Simplify right side
   2,059.60x = 4,439,600.88
5. Step 5: Solve for x
   x = 4,439,600.88/2,059.60
6. Step 6: Final answer
   x = 2,155.56