Finding the Fourth Proportional to 1,340.91, 1,850.27 and 781.29

Step by Step Solution

1. Step 1: Write the proportion equation
   1,340.91 : 1,850.27 = 781.29 : x
2. Step 2: Convert to fraction form
   1,340.91/1,850.27 = 781.29/x
3. Step 3: Cross multiply
   1,340.91x = 1,850.27 × 781.29
4. Step 4: Simplify right side
   1,340.91x = 1,445,593.54
5. Step 5: Solve for x
   x = 1,445,593.54/1,340.91
6. Step 6: Final answer
   x = 1,078.07