Finding the Fourth Proportional to 2,756.72, 4,135.76 and 808.94

Step by Step Solution

1. Step 1: Write the proportion equation
   2,756.72 : 4,135.76 = 808.94 : x
2. Step 2: Convert to fraction form
   2,756.72/4,135.76 = 808.94/x
3. Step 3: Cross multiply
   2,756.72x = 4,135.76 × 808.94
4. Step 4: Simplify right side
   2,756.72x = 3,345,581.69
5. Step 5: Solve for x
   x = 3,345,581.69/2,756.72
6. Step 6: Final answer
   x = 1,213.61