Finding the Fourth Proportional to 2,265.78, 3,126.74 and 1,271

Step by Step Solution

1. Step 1: Write the proportion equation
   2,265.78 : 3,126.74 = 1,271 : x
2. Step 2: Convert to fraction form
   2,265.78/3,126.74 = 1,271/x
3. Step 3: Cross multiply
   2,265.78x = 3,126.74 × 1,271
4. Step 4: Simplify right side
   2,265.78x = 3,974,086.54
5. Step 5: Solve for x
   x = 3,974,086.54/2,265.78
6. Step 6: Final answer
   x = 1,753.96