Finding the Fourth Proportional to 1,403.31, 1,936.61 and 773.88

Step by Step Solution

1. Step 1: Write the proportion equation
   1,403.31 : 1,936.61 = 773.88 : x
2. Step 2: Convert to fraction form
   1,403.31/1,936.61 = 773.88/x
3. Step 3: Cross multiply
   1,403.31x = 1,936.61 × 773.88
4. Step 4: Simplify right side
   1,403.31x = 1,498,703.75
5. Step 5: Solve for x
   x = 1,498,703.75/1,403.31
6. Step 6: Final answer
   x = 1,067.98