Finding the Fourth Proportional to 2,278.69, 3,144.55 and 1,284.14

Step by Step Solution

1. Step 1: Write the proportion equation
   2,278.69 : 3,144.55 = 1,284.14 : x
2. Step 2: Convert to fraction form
   2,278.69/3,144.55 = 1,284.14/x
3. Step 3: Cross multiply
   2,278.69x = 3,144.55 × 1,284.14
4. Step 4: Simplify right side
   2,278.69x = 4,038,042.44
5. Step 5: Solve for x
   x = 4,038,042.44/2,278.69
6. Step 6: Final answer
   x = 1,772.09