Finding the Fourth Proportional to 1,356.24, 1,871.70 and 766.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,356.24 : 1,871.70 = 766.83 : x
2. Step 2: Convert to fraction form
   1,356.24/1,871.70 = 766.83/x
3. Step 3: Cross multiply
   1,356.24x = 1,871.70 × 766.83
4. Step 4: Simplify right side
   1,356.24x = 1,435,275.71
5. Step 5: Solve for x
   x = 1,435,275.71/1,356.24
6. Step 6: Final answer
   x = 1,058.28