Finding the Third Proportional to 8,215,731 and 12,771,627

Step by Step Solution

1. Step 1: Write the proportion equation
   8,215,731 : 12,771,627 = 12,771,627 : x
2. Step 2: Convert to fraction form
   8,215,731/12,771,627 = 12,771,627/x
3. Step 3: Cross multiply
   8,215,731x = 12,771,627 × 12,771,627
4. Step 4: Simplify right side
   8,215,731x = 163,114,456,227,129
5. Step 5: Solve for x
   x = 163,114,456,227,129/8,215,731
6. Step 6: Final answer
   x = 19,853,918.81