Finding the Fourth Proportional to 1,350.78, 1,863.96 and 791.27

Step by Step Solution

1. Step 1: Write the proportion equation
   1,350.78 : 1,863.96 = 791.27 : x
2. Step 2: Convert to fraction form
   1,350.78/1,863.96 = 791.27/x
3. Step 3: Cross multiply
   1,350.78x = 1,863.96 × 791.27
4. Step 4: Simplify right side
   1,350.78x = 1,474,894.78
5. Step 5: Solve for x
   x = 1,474,894.78/1,350.78
6. Step 6: Final answer
   x = 1,091.89