Finding the Third Proportional to 4,636,561 and 9,958,705

Step by Step Solution

1. Step 1: Write the proportion equation
   4,636,561 : 9,958,705 = 9,958,705 : x
2. Step 2: Convert to fraction form
   4,636,561/9,958,705 = 9,958,705/x
3. Step 3: Cross multiply
   4,636,561x = 9,958,705 × 9,958,705
4. Step 4: Simplify right side
   4,636,561x = 99,175,805,277,025
5. Step 5: Solve for x
   x = 99,175,805,277,025/4,636,561
6. Step 6: Final answer
   x = 21,389,949.42