Finding the Third Proportional to 7,979,012 and 12,636,509

Step by Step Solution

1. Step 1: Write the proportion equation
   7,979,012 : 12,636,509 = 12,636,509 : x
2. Step 2: Convert to fraction form
   7,979,012/12,636,509 = 12,636,509/x
3. Step 3: Cross multiply
   7,979,012x = 12,636,509 × 12,636,509
4. Step 4: Simplify right side
   7,979,012x = 159,681,359,707,081
5. Step 5: Solve for x
   x = 159,681,359,707,081/7,979,012
6. Step 6: Final answer
   x = 20,012,673.21