Finding the Fourth Proportional to 2,764.16, 4,144.80 and 816.10

Step by Step Solution

1. Step 1: Write the proportion equation
   2,764.16 : 4,144.80 = 816.10 : x
2. Step 2: Convert to fraction form
   2,764.16/4,144.80 = 816.10/x
3. Step 3: Cross multiply
   2,764.16x = 4,144.80 × 816.10
4. Step 4: Simplify right side
   2,764.16x = 3,382,571.28
5. Step 5: Solve for x
   x = 3,382,571.28/2,764.16
6. Step 6: Final answer
   x = 1,223.72