Finding the Fourth Proportional to 20,059.56, 30,078.27 and 8,221.68

Step by Step Solution

1. Step 1: Write the proportion equation
   20,059.56 : 30,078.27 = 8,221.68 : x
2. Step 2: Convert to fraction form
   20,059.56/30,078.27 = 8,221.68/x
3. Step 3: Cross multiply
   20,059.56x = 30,078.27 × 8,221.68
4. Step 4: Simplify right side
   20,059.56x = 247,293,910.89
5. Step 5: Solve for x
   x = 247,293,910.89/20,059.56
6. Step 6: Final answer
   x = 12,327.98