Finding the Fourth Proportional to 2,571.27, 3,548.34 and 1,392.35

Step by Step Solution

1. Step 1: Write the proportion equation
   2,571.27 : 3,548.34 = 1,392.35 : x
2. Step 2: Convert to fraction form
   2,571.27/3,548.34 = 1,392.35/x
3. Step 3: Cross multiply
   2,571.27x = 3,548.34 × 1,392.35
4. Step 4: Simplify right side
   2,571.27x = 4,940,513.46
5. Step 5: Solve for x
   x = 4,940,513.46/2,571.27
6. Step 6: Final answer
   x = 1,921.43