Finding the Fourth Proportional to 2,816.15, 4,223.72 and 841.73

Step by Step Solution

1. Step 1: Write the proportion equation
   2,816.15 : 4,223.72 = 841.73 : x
2. Step 2: Convert to fraction form
   2,816.15/4,223.72 = 841.73/x
3. Step 3: Cross multiply
   2,816.15x = 4,223.72 × 841.73
4. Step 4: Simplify right side
   2,816.15x = 3,555,210.72
5. Step 5: Solve for x
   x = 3,555,210.72/2,816.15
6. Step 6: Final answer
   x = 1,262.44