Finding the Fourth Proportional to 2,278.80, 3,144.42 and 1,270.35

Step by Step Solution

1. Step 1: Write the proportion equation
   2,278.80 : 3,144.42 = 1,270.35 : x
2. Step 2: Convert to fraction form
   2,278.80/3,144.42 = 1,270.35/x
3. Step 3: Cross multiply
   2,278.80x = 3,144.42 × 1,270.35
4. Step 4: Simplify right side
   2,278.80x = 3,994,513.95
5. Step 5: Solve for x
   x = 3,994,513.95/2,278.80
6. Step 6: Final answer
   x = 1,752.90