Finding the Fourth Proportional to 2,756, 4,134 and 808.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,756 : 4,134 = 808.15 : x
2. Step 2: Convert to fraction form
   2,756/4,134 = 808.15/x
3. Step 3: Cross multiply
   2,756x = 4,134 × 808.15
4. Step 4: Simplify right side
   2,756x = 3,340,892.10
5. Step 5: Solve for x
   x = 3,340,892.10/2,756
6. Step 6: Final answer
   x = 1,212.23