Finding the Fourth Proportional to 2,328.56, 3,213.40 and 1,280.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,328.56 : 3,213.40 = 1,280.56 : x
2. Step 2: Convert to fraction form
   2,328.56/3,213.40 = 1,280.56/x
3. Step 3: Cross multiply
   2,328.56x = 3,213.40 × 1,280.56
4. Step 4: Simplify right side
   2,328.56x = 4,114,951.50
5. Step 5: Solve for x
   x = 4,114,951.50/2,328.56
6. Step 6: Final answer
   x = 1,767.17