Finding the Third Proportional to 9,970,142 and 21,689,884

Step by Step Solution

1. Step 1: Write the proportion equation
   9,970,142 : 21,689,884 = 21,689,884 : x
2. Step 2: Convert to fraction form
   9,970,142/21,689,884 = 21,689,884/x
3. Step 3: Cross multiply
   9,970,142x = 21,689,884 × 21,689,884
4. Step 4: Simplify right side
   9,970,142x = 470,451,067,933,456
5. Step 5: Solve for x
   x = 470,451,067,933,456/9,970,142
6. Step 6: Final answer
   x = 47,185,994.74