Finding the Third Proportional to 8,870 and 20,905

Step by Step Solution

1. Step 1: Write the proportion equation
   8,870 : 20,905 = 20,905 : x
2. Step 2: Convert to fraction form
   8,870/20,905 = 20,905/x
3. Step 3: Cross multiply
   8,870x = 20,905 × 20,905
4. Step 4: Simplify right side
   8,870x = 437,019,025
5. Step 5: Solve for x
   x = 437,019,025/8,870
6. Step 6: Final answer
   x = 49,269.34