Finding the Third Proportional to 12,215,876 and 18,897,744

Step by Step Solution

1. Step 1: Write the proportion equation
   12,215,876 : 18,897,744 = 18,897,744 : x
2. Step 2: Convert to fraction form
   12,215,876/18,897,744 = 18,897,744/x
3. Step 3: Cross multiply
   12,215,876x = 18,897,744 × 18,897,744
4. Step 4: Simplify right side
   12,215,876x = 357,124,728,289,536
5. Step 5: Solve for x
   x = 357,124,728,289,536/12,215,876
6. Step 6: Final answer
   x = 29,234,475.55