Finding the Fourth Proportional to 7,217.55, 10,828.22 and 3,057.72

Step by Step Solution

1. Step 1: Write the proportion equation
   7,217.55 : 10,828.22 = 3,057.72 : x
2. Step 2: Convert to fraction form
   7,217.55/10,828.22 = 3,057.72/x
3. Step 3: Cross multiply
   7,217.55x = 10,828.22 × 3,057.72
4. Step 4: Simplify right side
   7,217.55x = 33,109,664.86
5. Step 5: Solve for x
   x = 33,109,664.86/7,217.55
6. Step 6: Final answer
   x = 4,587.38