Finding the Third Proportional to 21,396,759 and 41,721,402

Step by Step Solution

1. Step 1: Write the proportion equation
   21,396,759 : 41,721,402 = 41,721,402 : x
2. Step 2: Convert to fraction form
   21,396,759/41,721,402 = 41,721,402/x
3. Step 3: Cross multiply
   21,396,759x = 41,721,402 × 41,721,402
4. Step 4: Simplify right side
   21,396,759x = 1,740,675,384,845,604
5. Step 5: Solve for x
   x = 1,740,675,384,845,604/21,396,759
6. Step 6: Final answer
   x = 81,352,291.95