Finding the Fourth Proportional to 2,571.47, 3,548.63 and 1,392.54

Step by Step Solution

1. Step 1: Write the proportion equation
   2,571.47 : 3,548.63 = 1,392.54 : x
2. Step 2: Convert to fraction form
   2,571.47/3,548.63 = 1,392.54/x
3. Step 3: Cross multiply
   2,571.47x = 3,548.63 × 1,392.54
4. Step 4: Simplify right side
   2,571.47x = 4,941,609.22
5. Step 5: Solve for x
   x = 4,941,609.22/2,571.47
6. Step 6: Final answer
   x = 1,921.71