Finding the Fourth Proportional to 2,657.41, 3,986.72 and 1,271.09

Step by Step Solution

1. Step 1: Write the proportion equation
   2,657.41 : 3,986.72 = 1,271.09 : x
2. Step 2: Convert to fraction form
   2,657.41/3,986.72 = 1,271.09/x
3. Step 3: Cross multiply
   2,657.41x = 3,986.72 × 1,271.09
4. Step 4: Simplify right side
   2,657.41x = 5,067,488.30
5. Step 5: Solve for x
   x = 5,067,488.30/2,657.41
6. Step 6: Final answer
   x = 1,906.93