Finding the Fourth Proportional to 2,571.53, 3,548.72 and 1,392.60

Step by Step Solution

1. Step 1: Write the proportion equation
   2,571.53 : 3,548.72 = 1,392.60 : x
2. Step 2: Convert to fraction form
   2,571.53/3,548.72 = 1,392.60/x
3. Step 3: Cross multiply
   2,571.53x = 3,548.72 × 1,392.60
4. Step 4: Simplify right side
   2,571.53x = 4,941,940.51
5. Step 5: Solve for x
   x = 4,941,940.51/2,571.53
6. Step 6: Final answer
   x = 1,921.79