Finding the Fourth Proportional to 2,067.72, 3,089.78 and 1,571.40

Step by Step Solution

1. Step 1: Write the proportion equation
   2,067.72 : 3,089.78 = 1,571.40 : x
2. Step 2: Convert to fraction form
   2,067.72/3,089.78 = 1,571.40/x
3. Step 3: Cross multiply
   2,067.72x = 3,089.78 × 1,571.40
4. Step 4: Simplify right side
   2,067.72x = 4,855,272.44
5. Step 5: Solve for x
   x = 4,855,272.44/2,067.72
6. Step 6: Final answer
   x = 2,348.13