Finding the Fourth Proportional to 2,328.42, 3,213.27 and 1,280.55

Step by Step Solution

1. Step 1: Write the proportion equation
   2,328.42 : 3,213.27 = 1,280.55 : x
2. Step 2: Convert to fraction form
   2,328.42/3,213.27 = 1,280.55/x
3. Step 3: Cross multiply
   2,328.42x = 3,213.27 × 1,280.55
4. Step 4: Simplify right side
   2,328.42x = 4,114,752.90
5. Step 5: Solve for x
   x = 4,114,752.90/2,328.42
6. Step 6: Final answer
   x = 1,767.19