Finding the Third Proportional to 7,970,776 and 12,689,304

Step by Step Solution

1. Step 1: Write the proportion equation
   7,970,776 : 12,689,304 = 12,689,304 : x
2. Step 2: Convert to fraction form
   7,970,776/12,689,304 = 12,689,304/x
3. Step 3: Cross multiply
   7,970,776x = 12,689,304 × 12,689,304
4. Step 4: Simplify right side
   7,970,776x = 161,018,436,004,416
5. Step 5: Solve for x
   x = 161,018,436,004,416/7,970,776
6. Step 6: Final answer
   x = 20,201,099.12