Finding the Fourth Proportional to 2,711.48, 4,066.72 and 763.28

Step by Step Solution

1. Step 1: Write the proportion equation
   2,711.48 : 4,066.72 = 763.28 : x
2. Step 2: Convert to fraction form
   2,711.48/4,066.72 = 763.28/x
3. Step 3: Cross multiply
   2,711.48x = 4,066.72 × 763.28
4. Step 4: Simplify right side
   2,711.48x = 3,104,046.04
5. Step 5: Solve for x
   x = 3,104,046.04/2,711.48
6. Step 6: Final answer
   x = 1,144.78