Finding the Fourth Proportional to 1,371.27, 1,892.35 and 781.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,371.27 : 1,892.35 = 781.82 : x
2. Step 2: Convert to fraction form
   1,371.27/1,892.35 = 781.82/x
3. Step 3: Cross multiply
   1,371.27x = 1,892.35 × 781.82
4. Step 4: Simplify right side
   1,371.27x = 1,479,475.69
5. Step 5: Solve for x
   x = 1,479,475.69/1,371.27
6. Step 6: Final answer
   x = 1,078.91