Finding the Fourth Proportional to 1,356.33, 1,871.69 and 766.85

Step by Step Solution

1. Step 1: Write the proportion equation
   1,356.33 : 1,871.69 = 766.85 : x
2. Step 2: Convert to fraction form
   1,356.33/1,871.69 = 766.85/x
3. Step 3: Cross multiply
   1,356.33x = 1,871.69 × 766.85
4. Step 4: Simplify right side
   1,356.33x = 1,435,306.32
5. Step 5: Solve for x
   x = 1,435,306.32/1,356.33
6. Step 6: Final answer
   x = 1,058.23