Finding the Fourth Proportional to 2,144.58, 3,216.15 and 757.68

Step by Step Solution

1. Step 1: Write the proportion equation
   2,144.58 : 3,216.15 = 757.68 : x
2. Step 2: Convert to fraction form
   2,144.58/3,216.15 = 757.68/x
3. Step 3: Cross multiply
   2,144.58x = 3,216.15 × 757.68
4. Step 4: Simplify right side
   2,144.58x = 2,436,812.53
5. Step 5: Solve for x
   x = 2,436,812.53/2,144.58
6. Step 6: Final answer
   x = 1,136.27