Finding the Fourth Proportional to 1,340.61, 1,850.27 and 781.41

Step by Step Solution

1. Step 1: Write the proportion equation
   1,340.61 : 1,850.27 = 781.41 : x
2. Step 2: Convert to fraction form
   1,340.61/1,850.27 = 781.41/x
3. Step 3: Cross multiply
   1,340.61x = 1,850.27 × 781.41
4. Step 4: Simplify right side
   1,340.61x = 1,445,809.10
5. Step 5: Solve for x
   x = 1,445,809.10/1,340.61
6. Step 6: Final answer
   x = 1,078.47