Finding the Fourth Proportional to 2,571.56, 3,548.75 and 1,392.63

Step by Step Solution

1. Step 1: Write the proportion equation
   2,571.56 : 3,548.75 = 1,392.63 : x
2. Step 2: Convert to fraction form
   2,571.56/3,548.75 = 1,392.63/x
3. Step 3: Cross multiply
   2,571.56x = 3,548.75 × 1,392.63
4. Step 4: Simplify right side
   2,571.56x = 4,942,075.44
5. Step 5: Solve for x
   x = 4,942,075.44/2,571.56
6. Step 6: Final answer
   x = 1,921.82