Finding the Fourth Proportional to 2,077.12, 2,866.22 and 1,280.32

Step by Step Solution

1. Step 1: Write the proportion equation
   2,077.12 : 2,866.22 = 1,280.32 : x
2. Step 2: Convert to fraction form
   2,077.12/2,866.22 = 1,280.32/x
3. Step 3: Cross multiply
   2,077.12x = 2,866.22 × 1,280.32
4. Step 4: Simplify right side
   2,077.12x = 3,669,678.79
5. Step 5: Solve for x
   x = 3,669,678.79/2,077.12
6. Step 6: Final answer
   x = 1,766.71