Finding the Fourth Proportional to 2,278.05, 3,143.86 and 1,269.82

Step by Step Solution

1. Step 1: Write the proportion equation
   2,278.05 : 3,143.86 = 1,269.82 : x
2. Step 2: Convert to fraction form
   2,278.05/3,143.86 = 1,269.82/x
3. Step 3: Cross multiply
   2,278.05x = 3,143.86 × 1,269.82
4. Step 4: Simplify right side
   2,278.05x = 3,992,120.59
5. Step 5: Solve for x
   x = 3,992,120.59/2,278.05
6. Step 6: Final answer
   x = 1,752.43