Finding the Fourth Proportional to 2,328.27, 3,212.73 and 1,280.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,328.27 : 3,212.73 = 1,280.31 : x
2. Step 2: Convert to fraction form
   2,328.27/3,212.73 = 1,280.31/x
3. Step 3: Cross multiply
   2,328.27x = 3,212.73 × 1,280.31
4. Step 4: Simplify right side
   2,328.27x = 4,113,290.35
5. Step 5: Solve for x
   x = 4,113,290.35/2,328.27
6. Step 6: Final answer
   x = 1,766.67