Finding the Fourth Proportional to 2,077.78, 2,866.49 and 1,269.81

Step by Step Solution

1. Step 1: Write the proportion equation
   2,077.78 : 2,866.49 = 1,269.81 : x
2. Step 2: Convert to fraction form
   2,077.78/2,866.49 = 1,269.81/x
3. Step 3: Cross multiply
   2,077.78x = 2,866.49 × 1,269.81
4. Step 4: Simplify right side
   2,077.78x = 3,639,891.32
5. Step 5: Solve for x
   x = 3,639,891.32/2,077.78
6. Step 6: Final answer
   x = 1,751.82