Finding the Fourth Proportional to 8,768.72, 13,154.24 and 3,220.72

Step by Step Solution

1. Step 1: Write the proportion equation
   8,768.72 : 13,154.24 = 3,220.72 : x
2. Step 2: Convert to fraction form
   8,768.72/13,154.24 = 3,220.72/x
3. Step 3: Cross multiply
   8,768.72x = 13,154.24 × 3,220.72
4. Step 4: Simplify right side
   8,768.72x = 42,366,123.85
5. Step 5: Solve for x
   x = 42,366,123.85/8,768.72
6. Step 6: Final answer
   x = 4,831.51