Finding the Fourth Proportional to 2,328.12, 3,212.82 and 1,280.16

Step by Step Solution

1. Step 1: Write the proportion equation
   2,328.12 : 3,212.82 = 1,280.16 : x
2. Step 2: Convert to fraction form
   2,328.12/3,212.82 = 1,280.16/x
3. Step 3: Cross multiply
   2,328.12x = 3,212.82 × 1,280.16
4. Step 4: Simplify right side
   2,328.12x = 4,112,923.65
5. Step 5: Solve for x
   x = 4,112,923.65/2,328.12
6. Step 6: Final answer
   x = 1,766.63