Finding the Third Proportional to 7,970,910 and 12,689,441

Step by Step Solution

1. Step 1: Write the proportion equation
   7,970,910 : 12,689,441 = 12,689,441 : x
2. Step 2: Convert to fraction form
   7,970,910/12,689,441 = 12,689,441/x
3. Step 3: Cross multiply
   7,970,910x = 12,689,441 × 12,689,441
4. Step 4: Simplify right side
   7,970,910x = 161,021,912,892,481
5. Step 5: Solve for x
   x = 161,021,912,892,481/7,970,910
6. Step 6: Final answer
   x = 20,201,195.71