Finding the Fourth Proportional to 2,270.78, 3,134.27 and 1,276.38

Step by Step Solution

1. Step 1: Write the proportion equation
   2,270.78 : 3,134.27 = 1,276.38 : x
2. Step 2: Convert to fraction form
   2,270.78/3,134.27 = 1,276.38/x
3. Step 3: Cross multiply
   2,270.78x = 3,134.27 × 1,276.38
4. Step 4: Simplify right side
   2,270.78x = 4,000,522.73
5. Step 5: Solve for x
   x = 4,000,522.73/2,270.78
6. Step 6: Final answer
   x = 1,761.74