Finding the Fourth Proportional to 2,276.72, 3,414.24 and 815.52

Step by Step Solution

1. Step 1: Write the proportion equation
   2,276.72 : 3,414.24 = 815.52 : x
2. Step 2: Convert to fraction form
   2,276.72/3,414.24 = 815.52/x
3. Step 3: Cross multiply
   2,276.72x = 3,414.24 × 815.52
4. Step 4: Simplify right side
   2,276.72x = 2,784,381.00
5. Step 5: Solve for x
   x = 2,784,381.00/2,276.72
6. Step 6: Final answer
   x = 1,222.98