Finding the Fourth Proportional to 1,273.91, 1,758.33 and 776.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,273.91 : 1,758.33 = 776.83 : x
2. Step 2: Convert to fraction form
   1,273.91/1,758.33 = 776.83/x
3. Step 3: Cross multiply
   1,273.91x = 1,758.33 × 776.83
4. Step 4: Simplify right side
   1,273.91x = 1,365,923.49
5. Step 5: Solve for x
   x = 1,365,923.49/1,273.91
6. Step 6: Final answer
   x = 1,072.23