Finding the Fourth Proportional to 2,571.43, 3,548.58 and 1,392.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,571.43 : 3,548.58 = 1,392.50 : x
2. Step 2: Convert to fraction form
   2,571.43/3,548.58 = 1,392.50/x
3. Step 3: Cross multiply
   2,571.43x = 3,548.58 × 1,392.50
4. Step 4: Simplify right side
   2,571.43x = 4,941,409.23
5. Step 5: Solve for x
   x = 4,941,409.23/2,571.43
6. Step 6: Final answer
   x = 1,921.66