Finding the Fourth Proportional to 1,403.28, 1,936.56 and 773.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,403.28 : 1,936.56 = 773.82 : x
2. Step 2: Convert to fraction form
   1,403.28/1,936.56 = 773.82/x
3. Step 3: Cross multiply
   1,403.28x = 1,936.56 × 773.82
4. Step 4: Simplify right side
   1,403.28x = 1,498,548.86
5. Step 5: Solve for x
   x = 1,498,548.86/1,403.28
6. Step 6: Final answer
   x = 1,067.89