Finding the Fourth Proportional to 2,381.28, 3,287.46 and 1,674.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,381.28 : 3,287.46 = 1,674.15 : x
2. Step 2: Convert to fraction form
   2,381.28/3,287.46 = 1,674.15/x
3. Step 3: Cross multiply
   2,381.28x = 3,287.46 × 1,674.15
4. Step 4: Simplify right side
   2,381.28x = 5,503,701.16
5. Step 5: Solve for x
   x = 5,503,701.16/2,381.28
6. Step 6: Final answer
   x = 2,311.24