Finding the Fourth Proportional to 1,270.73, 1,754.15 and 773.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,270.73 : 1,754.15 = 773.55 : x
2. Step 2: Convert to fraction form
   1,270.73/1,754.15 = 773.55/x
3. Step 3: Cross multiply
   1,270.73x = 1,754.15 × 773.55
4. Step 4: Simplify right side
   1,270.73x = 1,356,918.86
5. Step 5: Solve for x
   x = 1,356,918.86/1,270.73
6. Step 6: Final answer
   x = 1,067.82