Finding the Fourth Proportional to 2,808.56, 4,212.72 and 756.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,808.56 : 4,212.72 = 756.56 : x
2. Step 2: Convert to fraction form
   2,808.56/4,212.72 = 756.56/x
3. Step 3: Cross multiply
   2,808.56x = 4,212.72 × 756.56
4. Step 4: Simplify right side
   2,808.56x = 3,187,175.44
5. Step 5: Solve for x
   x = 3,187,175.44/2,808.56
6. Step 6: Final answer
   x = 1,134.81