Finding the Third Proportional to 9,970,110 and 21,689,820

Step by Step Solution

1. Step 1: Write the proportion equation
   9,970,110 : 21,689,820 = 21,689,820 : x
2. Step 2: Convert to fraction form
   9,970,110/21,689,820 = 21,689,820/x
3. Step 3: Cross multiply
   9,970,110x = 21,689,820 × 21,689,820
4. Step 4: Simplify right side
   9,970,110x = 470,448,291,632,400
5. Step 5: Solve for x
   x = 470,448,291,632,400/9,970,110
6. Step 6: Final answer
   x = 47,185,867.72