Finding the Third Proportional to 12,469,780.50 and 19,857,231

Step by Step Solution

1. Step 1: Write the proportion equation
   12,469,780.50 : 19,857,231 = 19,857,231 : x
2. Step 2: Convert to fraction form
   12,469,780.50/19,857,231 = 19,857,231/x
3. Step 3: Cross multiply
   12,469,780.50x = 19,857,231 × 19,857,231
4. Step 4: Simplify right side
   12,469,780.50x = 394,309,622,987,361
5. Step 5: Solve for x
   x = 394,309,622,987,361/12,469,780.50
6. Step 6: Final answer
   x = 31,621,216.03