Finding the Third Proportional to 8,997,138 and 12,856,647

Step by Step Solution

1. Step 1: Write the proportion equation
   8,997,138 : 12,856,647 = 12,856,647 : x
2. Step 2: Convert to fraction form
   8,997,138/12,856,647 = 12,856,647/x
3. Step 3: Cross multiply
   8,997,138x = 12,856,647 × 12,856,647
4. Step 4: Simplify right side
   8,997,138x = 165,293,372,082,609
5. Step 5: Solve for x
   x = 165,293,372,082,609/8,997,138
6. Step 6: Final answer
   x = 18,371,772.46