Finding the Fourth Proportional to 2,571.36, 3,548.48 and 1,392.43

Step by Step Solution

1. Step 1: Write the proportion equation
   2,571.36 : 3,548.48 = 1,392.43 : x
2. Step 2: Convert to fraction form
   2,571.36/3,548.48 = 1,392.43/x
3. Step 3: Cross multiply
   2,571.36x = 3,548.48 × 1,392.43
4. Step 4: Simplify right side
   2,571.36x = 4,941,004.62
5. Step 5: Solve for x
   x = 4,941,004.62/2,571.36
6. Step 6: Final answer
   x = 1,921.56