Finding the Fourth Proportional to 2,381.28, 3,286.56 and 1,449.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,381.28 : 3,286.56 = 1,449.72 : x
2. Step 2: Convert to fraction form
   2,381.28/3,286.56 = 1,449.72/x
3. Step 3: Cross multiply
   2,381.28x = 3,286.56 × 1,449.72
4. Step 4: Simplify right side
   2,381.28x = 4,764,591.76
5. Step 5: Solve for x
   x = 4,764,591.76/2,381.28
6. Step 6: Final answer
   x = 2,000.85