Finding the Fourth Proportional to 10,221.41, 15,332.18 and 3,105.72

Step by Step Solution

1. Step 1: Write the proportion equation
   10,221.41 : 15,332.18 = 3,105.72 : x
2. Step 2: Convert to fraction form
   10,221.41/15,332.18 = 3,105.72/x
3. Step 3: Cross multiply
   10,221.41x = 15,332.18 × 3,105.72
4. Step 4: Simplify right side
   10,221.41x = 47,617,442.54
5. Step 5: Solve for x
   x = 47,617,442.54/10,221.41
6. Step 6: Final answer
   x = 4,658.60