Finding the Third Proportional to 12,339,109,974 and 18,797,780,530

Step by Step Solution

1. Step 1: Write the proportion equation
   12,339,109,974 : 18,797,780,530 = 18,797,780,530 : x
2. Step 2: Convert to fraction form
   12,339,109,974/18,797,780,530 = 18,797,780,530/x
3. Step 3: Cross multiply
   12,339,109,974x = 18,797,780,530 × 18,797,780,530
4. Step 4: Simplify right side
   12,339,109,974x = 353,356,552,854,047,096,832
5. Step 5: Solve for x
   x = 353,356,552,854,047,096,832/12,339,109,974
6. Step 6: Final answer
   x = 28,637,118,365.80