Finding the Fourth Proportional to 1,340.92, 1,850.15 and 781.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,340.92 : 1,850.15 = 781.10 : x
2. Step 2: Convert to fraction form
   1,340.92/1,850.15 = 781.10/x
3. Step 3: Cross multiply
   1,340.92x = 1,850.15 × 781.10
4. Step 4: Simplify right side
   1,340.92x = 1,445,144.87
5. Step 5: Solve for x
   x = 1,445,144.87/1,340.92
6. Step 6: Final answer
   x = 1,077.73