Finding the Fourth Proportional to 3,638.28, 5,456.82 and 1,040.52

Step by Step Solution

1. Step 1: Write the proportion equation
   3,638.28 : 5,456.82 = 1,040.52 : x
2. Step 2: Convert to fraction form
   3,638.28/5,456.82 = 1,040.52/x
3. Step 3: Cross multiply
   3,638.28x = 5,456.82 × 1,040.52
4. Step 4: Simplify right side
   3,638.28x = 5,677,930.35
5. Step 5: Solve for x
   x = 5,677,930.35/3,638.28
6. Step 6: Final answer
   x = 1,560.61