Finding the Fourth Proportional to 2,143.98, 3,216.17 and 757.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,143.98 : 3,216.17 = 757.30 : x
2. Step 2: Convert to fraction form
   2,143.98/3,216.17 = 757.30/x
3. Step 3: Cross multiply
   2,143.98x = 3,216.17 × 757.30
4. Step 4: Simplify right side
   2,143.98x = 2,435,605.54
5. Step 5: Solve for x
   x = 2,435,605.54/2,143.98
6. Step 6: Final answer
   x = 1,136.02