Finding the Fourth Proportional to 2,144.06, 3,215.48 and 757.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,144.06 : 3,215.48 = 757.20 : x
2. Step 2: Convert to fraction form
   2,144.06/3,215.48 = 757.20/x
3. Step 3: Cross multiply
   2,144.06x = 3,215.48 × 757.20
4. Step 4: Simplify right side
   2,144.06x = 2,434,761.46
5. Step 5: Solve for x
   x = 2,434,761.46/2,144.06
6. Step 6: Final answer
   x = 1,135.59