Finding the Fourth Proportional to 4,815.92, 7,219.56 and 2,216.72

Step by Step Solution

1. Step 1: Write the proportion equation
   4,815.92 : 7,219.56 = 2,216.72 : x
2. Step 2: Convert to fraction form
   4,815.92/7,219.56 = 2,216.72/x
3. Step 3: Cross multiply
   4,815.92x = 7,219.56 × 2,216.72
4. Step 4: Simplify right side
   4,815.92x = 16,003,743.04
5. Step 5: Solve for x
   x = 16,003,743.04/4,815.92
6. Step 6: Final answer
   x = 3,323.09