Finding the Third Proportional to 4,465,857 and 9,687,870

Step by Step Solution

1. Step 1: Write the proportion equation
   4,465,857 : 9,687,870 = 9,687,870 : x
2. Step 2: Convert to fraction form
   4,465,857/9,687,870 = 9,687,870/x
3. Step 3: Cross multiply
   4,465,857x = 9,687,870 × 9,687,870
4. Step 4: Simplify right side
   4,465,857x = 93,854,825,136,900
5. Step 5: Solve for x
   x = 93,854,825,136,900/4,465,857
6. Step 6: Final answer
   x = 21,016,083.84