Finding the Third Proportional to 9,691,815 and 21,144,039

Step by Step Solution

1. Step 1: Write the proportion equation
   9,691,815 : 21,144,039 = 21,144,039 : x
2. Step 2: Convert to fraction form
   9,691,815/21,144,039 = 21,144,039/x
3. Step 3: Cross multiply
   9,691,815x = 21,144,039 × 21,144,039
4. Step 4: Simplify right side
   9,691,815x = 447,070,385,233,521
5. Step 5: Solve for x
   x = 447,070,385,233,521/9,691,815
6. Step 6: Final answer
   x = 46,128,654.46