Finding the Third Proportional to 4,636,602 and 9,958,788

Step by Step Solution

1. Step 1: Write the proportion equation
   4,636,602 : 9,958,788 = 9,958,788 : x
2. Step 2: Convert to fraction form
   4,636,602/9,958,788 = 9,958,788/x
3. Step 3: Cross multiply
   4,636,602x = 9,958,788 × 9,958,788
4. Step 4: Simplify right side
   4,636,602x = 99,177,458,428,944
5. Step 5: Solve for x
   x = 99,177,458,428,944/4,636,602
6. Step 6: Final answer
   x = 21,390,116.82