Finding the Fourth Proportional to 1,391.57, 1,919.27 and 894.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,391.57 : 1,919.27 = 894.25 : x
2. Step 2: Convert to fraction form
   1,391.57/1,919.27 = 894.25/x
3. Step 3: Cross multiply
   1,391.57x = 1,919.27 × 894.25
4. Step 4: Simplify right side
   1,391.57x = 1,716,304.63
5. Step 5: Solve for x
   x = 1,716,304.63/1,391.57
6. Step 6: Final answer
   x = 1,233.36