Finding the Fourth Proportional to 1,340.43, 1,850.03 and 781.07

Step by Step Solution

1. Step 1: Write the proportion equation
   1,340.43 : 1,850.03 = 781.07 : x
2. Step 2: Convert to fraction form
   1,340.43/1,850.03 = 781.07/x
3. Step 3: Cross multiply
   1,340.43x = 1,850.03 × 781.07
4. Step 4: Simplify right side
   1,340.43x = 1,445,002.93
5. Step 5: Solve for x
   x = 1,445,002.93/1,340.43
6. Step 6: Final answer
   x = 1,078.01