Finding the Fourth Proportional to 7,146.37, 10,721.15 and 2,216.05

Step by Step Solution

1. Step 1: Write the proportion equation
   7,146.37 : 10,721.15 = 2,216.05 : x
2. Step 2: Convert to fraction form
   7,146.37/10,721.15 = 2,216.05/x
3. Step 3: Cross multiply
   7,146.37x = 10,721.15 × 2,216.05
4. Step 4: Simplify right side
   7,146.37x = 23,758,604.46
5. Step 5: Solve for x
   x = 23,758,604.46/7,146.37
6. Step 6: Final answer
   x = 3,324.57