Finding the Third Proportional to 4,636,485 and 9,958,554

Step by Step Solution

1. Step 1: Write the proportion equation
   4,636,485 : 9,958,554 = 9,958,554 : x
2. Step 2: Convert to fraction form
   4,636,485/9,958,554 = 9,958,554/x
3. Step 3: Cross multiply
   4,636,485x = 9,958,554 × 9,958,554
4. Step 4: Simplify right side
   4,636,485x = 99,172,797,770,916
5. Step 5: Solve for x
   x = 99,172,797,770,916/4,636,485
6. Step 6: Final answer
   x = 21,389,651.38