Finding the Fourth Proportional to 1,394.28, 1,919.94 and 1,083.24

Step by Step Solution

1. Step 1: Write the proportion equation
   1,394.28 : 1,919.94 = 1,083.24 : x
2. Step 2: Convert to fraction form
   1,394.28/1,919.94 = 1,083.24/x
3. Step 3: Cross multiply
   1,394.28x = 1,919.94 × 1,083.24
4. Step 4: Simplify right side
   1,394.28x = 2,079,755.81
5. Step 5: Solve for x
   x = 2,079,755.81/1,394.28
6. Step 6: Final answer
   x = 1,491.63