Finding the Fourth Proportional to 2,728.01, 4,089.89 and 1,266.98

Step by Step Solution

1. Step 1: Write the proportion equation
   2,728.01 : 4,089.89 = 1,266.98 : x
2. Step 2: Convert to fraction form
   2,728.01/4,089.89 = 1,266.98/x
3. Step 3: Cross multiply
   2,728.01x = 4,089.89 × 1,266.98
4. Step 4: Simplify right side
   2,728.01x = 5,181,791.55
5. Step 5: Solve for x
   x = 5,181,791.55/2,728.01
6. Step 6: Final answer
   x = 1,899.48