Finding the Third Proportional to 4,636,526 and 9,958,634

Step by Step Solution

1. Step 1: Write the proportion equation
   4,636,526 : 9,958,634 = 9,958,634 : x
2. Step 2: Convert to fraction form
   4,636,526/9,958,634 = 9,958,634/x
3. Step 3: Cross multiply
   4,636,526x = 9,958,634 × 9,958,634
4. Step 4: Simplify right side
   4,636,526x = 99,174,391,145,956
5. Step 5: Solve for x
   x = 99,174,391,145,956/4,636,526
6. Step 6: Final answer
   x = 21,389,805.89