Finding the Fourth Proportional to 2,710.56, 4,066.60 and 762.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,710.56 : 4,066.60 = 762.78 : x
2. Step 2: Convert to fraction form
   2,710.56/4,066.60 = 762.78/x
3. Step 3: Cross multiply
   2,710.56x = 4,066.60 × 762.78
4. Step 4: Simplify right side
   2,710.56x = 3,101,921.15
5. Step 5: Solve for x
   x = 3,101,921.15/2,710.56
6. Step 6: Final answer
   x = 1,144.38