Finding the Third Proportional to 4,636,868 and 9,911,852

Step by Step Solution

1. Step 1: Write the proportion equation
   4,636,868 : 9,911,852 = 9,911,852 : x
2. Step 2: Convert to fraction form
   4,636,868/9,911,852 = 9,911,852/x
3. Step 3: Cross multiply
   4,636,868x = 9,911,852 × 9,911,852
4. Step 4: Simplify right side
   4,636,868x = 98,244,810,069,904
5. Step 5: Solve for x
   x = 98,244,810,069,904/4,636,868
6. Step 6: Final answer
   x = 21,187,752.18