Finding the Third Proportional to 9,107,918 and 21,500,686

Step by Step Solution

1. Step 1: Write the proportion equation
   9,107,918 : 21,500,686 = 21,500,686 : x
2. Step 2: Convert to fraction form
   9,107,918/21,500,686 = 21,500,686/x
3. Step 3: Cross multiply
   9,107,918x = 21,500,686 × 21,500,686
4. Step 4: Simplify right side
   9,107,918x = 462,279,498,470,596
5. Step 5: Solve for x
   x = 462,279,498,470,596/9,107,918
6. Step 6: Final answer
   x = 50,755,781.78