Finding the Third Proportional to 12,687,848 and 18,086,988

Step by Step Solution

1. Step 1: Write the proportion equation
   12,687,848 : 18,086,988 = 18,086,988 : x
2. Step 2: Convert to fraction form
   12,687,848/18,086,988 = 18,086,988/x
3. Step 3: Cross multiply
   12,687,848x = 18,086,988 × 18,086,988
4. Step 4: Simplify right side
   12,687,848x = 327,139,134,912,144
5. Step 5: Solve for x
   x = 327,139,134,912,144/12,687,848
6. Step 6: Final answer
   x = 25,783,658.10