Finding the Fourth Proportional to 2,328.16, 3,213.12 and 1,280.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,328.16 : 3,213.12 = 1,280.20 : x
2. Step 2: Convert to fraction form
   2,328.16/3,213.12 = 1,280.20/x
3. Step 3: Cross multiply
   2,328.16x = 3,213.12 × 1,280.20
4. Step 4: Simplify right side
   2,328.16x = 4,113,436.22
5. Step 5: Solve for x
   x = 4,113,436.22/2,328.16
6. Step 6: Final answer
   x = 1,766.82