Finding the Third Proportional to 8,662.88 and 20,211.38

Step by Step Solution

1. Step 1: Write the proportion equation
   8,662.88 : 20,211.38 = 20,211.38 : x
2. Step 2: Convert to fraction form
   8,662.88/20,211.38 = 20,211.38/x
3. Step 3: Cross multiply
   8,662.88x = 20,211.38 × 20,211.38
4. Step 4: Simplify right side
   8,662.88x = 408,499,679.39
5. Step 5: Solve for x
   x = 408,499,679.39/8,662.88
6. Step 6: Final answer
   x = 47,155.21