Finding the Fourth Proportional to 2,429.56, 3,644.28 and 698.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,429.56 : 3,644.28 = 698.20 : x
2. Step 2: Convert to fraction form
   2,429.56/3,644.28 = 698.20/x
3. Step 3: Cross multiply
   2,429.56x = 3,644.28 × 698.20
4. Step 4: Simplify right side
   2,429.56x = 2,544,436.30
5. Step 5: Solve for x
   x = 2,544,436.30/2,429.56
6. Step 6: Final answer
   x = 1,047.28