Finding the Fourth Proportional to 2,571.30, 3,548.39 and 1,392.37

Step by Step Solution

1. Step 1: Write the proportion equation
   2,571.30 : 3,548.39 = 1,392.37 : x
2. Step 2: Convert to fraction form
   2,571.30/3,548.39 = 1,392.37/x
3. Step 3: Cross multiply
   2,571.30x = 3,548.39 × 1,392.37
4. Step 4: Simplify right side
   2,571.30x = 4,940,671.78
5. Step 5: Solve for x
   x = 4,940,671.78/2,571.30
6. Step 6: Final answer
   x = 1,921.47