Finding the Fourth Proportional to 2,266.72, 3,128.06 and 1,271.98

Step by Step Solution

1. Step 1: Write the proportion equation
   2,266.72 : 3,128.06 = 1,271.98 : x
2. Step 2: Convert to fraction form
   2,266.72/3,128.06 = 1,271.98/x
3. Step 3: Cross multiply
   2,266.72x = 3,128.06 × 1,271.98
4. Step 4: Simplify right side
   2,266.72x = 3,978,836.85
5. Step 5: Solve for x
   x = 3,978,836.85/2,266.72
6. Step 6: Final answer
   x = 1,755.33