Finding the Fourth Proportional to 2,428.72, 3,643.26 and 697.48

Step by Step Solution

1. Step 1: Write the proportion equation
   2,428.72 : 3,643.26 = 697.48 : x
2. Step 2: Convert to fraction form
   2,428.72/3,643.26 = 697.48/x
3. Step 3: Cross multiply
   2,428.72x = 3,643.26 × 697.48
4. Step 4: Simplify right side
   2,428.72x = 2,541,100.98
5. Step 5: Solve for x
   x = 2,541,100.98/2,428.72
6. Step 6: Final answer
   x = 1,046.27