Finding the Third Proportional to 9,691,841,073 and 21,081,793,605

Step by Step Solution

1. Step 1: Write the proportion equation
   9,691,841,073 : 21,081,793,605 = 21,081,793,605 : x
2. Step 2: Convert to fraction form
   9,691,841,073/21,081,793,605 = 21,081,793,605/x
3. Step 3: Cross multiply
   9,691,841,073x = 21,081,793,605 × 21,081,793,605
4. Step 4: Simplify right side
   9,691,841,073x = 444,442,021,603,818,864,640
5. Step 5: Solve for x
   x = 444,442,021,603,818,864,640/9,691,841,073
6. Step 6: Final answer
   x = 45,857,336,934.87