Finding the Fourth Proportional to 2,277.52, 3,142.78 and 1,269.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,277.52 : 3,142.78 = 1,269.20 : x
2. Step 2: Convert to fraction form
   2,277.52/3,142.78 = 1,269.20/x
3. Step 3: Cross multiply
   2,277.52x = 3,142.78 × 1,269.20
4. Step 4: Simplify right side
   2,277.52x = 3,988,816.38
5. Step 5: Solve for x
   x = 3,988,816.38/2,277.52
6. Step 6: Final answer
   x = 1,751.39