Finding the Fourth Proportional to 1,391.67, 1,919.94 and 894.24

Step by Step Solution

1. Step 1: Write the proportion equation
   1,391.67 : 1,919.94 = 894.24 : x
2. Step 2: Convert to fraction form
   1,391.67/1,919.94 = 894.24/x
3. Step 3: Cross multiply
   1,391.67x = 1,919.94 × 894.24
4. Step 4: Simplify right side
   1,391.67x = 1,716,887.15
5. Step 5: Solve for x
   x = 1,716,887.15/1,391.67
6. Step 6: Final answer
   x = 1,233.69