Finding the Fourth Proportional to 2,453.28, 3,383.72 and 1,557.28

Step by Step Solution

1. Step 1: Write the proportion equation
   2,453.28 : 3,383.72 = 1,557.28 : x
2. Step 2: Convert to fraction form
   2,453.28/3,383.72 = 1,557.28/x
3. Step 3: Cross multiply
   2,453.28x = 3,383.72 × 1,557.28
4. Step 4: Simplify right side
   2,453.28x = 5,269,399.48
5. Step 5: Solve for x
   x = 5,269,399.48/2,453.28
6. Step 6: Final answer
   x = 2,147.90