Finding the Fourth Proportional to 2,276.80, 3,414.72 and 816.04

Step by Step Solution

1. Step 1: Write the proportion equation
   2,276.80 : 3,414.72 = 816.04 : x
2. Step 2: Convert to fraction form
   2,276.80/3,414.72 = 816.04/x
3. Step 3: Cross multiply
   2,276.80x = 3,414.72 × 816.04
4. Step 4: Simplify right side
   2,276.80x = 2,786,548.11
5. Step 5: Solve for x
   x = 2,786,548.11/2,276.80
6. Step 6: Final answer
   x = 1,223.89