Finding the Third Proportional to 12,979,892 and 20,177,806

Step by Step Solution

1. Step 1: Write the proportion equation
   12,979,892 : 20,177,806 = 20,177,806 : x
2. Step 2: Convert to fraction form
   12,979,892/20,177,806 = 20,177,806/x
3. Step 3: Cross multiply
   12,979,892x = 20,177,806 × 20,177,806
4. Step 4: Simplify right side
   12,979,892x = 407,143,854,973,636
5. Step 5: Solve for x
   x = 407,143,854,973,636/12,979,892
6. Step 6: Final answer
   x = 31,367,276.01