Finding the Fourth Proportional to 2,571.72, 3,549 and 1,392.82

Step by Step Solution

1. Step 1: Write the proportion equation
   2,571.72 : 3,549 = 1,392.82 : x
2. Step 2: Convert to fraction form
   2,571.72/3,549 = 1,392.82/x
3. Step 3: Cross multiply
   2,571.72x = 3,549 × 1,392.82
4. Step 4: Simplify right side
   2,571.72x = 4,943,118.18
5. Step 5: Solve for x
   x = 4,943,118.18/2,571.72
6. Step 6: Final answer
   x = 1,922.11