Finding the Fourth Proportional to 7,147.47, 10,721.34 and 2,217.27

Step by Step Solution

1. Step 1: Write the proportion equation
   7,147.47 : 10,721.34 = 2,217.27 : x
2. Step 2: Convert to fraction form
   7,147.47/10,721.34 = 2,217.27/x
3. Step 3: Cross multiply
   7,147.47x = 10,721.34 × 2,217.27
4. Step 4: Simplify right side
   7,147.47x = 23,772,105.54
5. Step 5: Solve for x
   x = 23,772,105.54/7,147.47
6. Step 6: Final answer
   x = 3,325.95