Finding the Fourth Proportional to 2,789.94, 4,184.22 and 815.04

Step by Step Solution

1. Step 1: Write the proportion equation
   2,789.94 : 4,184.22 = 815.04 : x
2. Step 2: Convert to fraction form
   2,789.94/4,184.22 = 815.04/x
3. Step 3: Cross multiply
   2,789.94x = 4,184.22 × 815.04
4. Step 4: Simplify right side
   2,789.94x = 3,410,306.67
5. Step 5: Solve for x
   x = 3,410,306.67/2,789.94
6. Step 6: Final answer
   x = 1,222.36