Finding the Fourth Proportional to 2,571.42, 3,548.55 and 1,392.49

Step by Step Solution

1. Step 1: Write the proportion equation
   2,571.42 : 3,548.55 = 1,392.49 : x
2. Step 2: Convert to fraction form
   2,571.42/3,548.55 = 1,392.49/x
3. Step 3: Cross multiply
   2,571.42x = 3,548.55 × 1,392.49
4. Step 4: Simplify right side
   2,571.42x = 4,941,322.21
5. Step 5: Solve for x
   x = 4,941,322.21/2,571.42
6. Step 6: Final answer
   x = 1,921.63