Finding the Third Proportional to 12,644,456 and 18,068,658

Step by Step Solution

1. Step 1: Write the proportion equation
   12,644,456 : 18,068,658 = 18,068,658 : x
2. Step 2: Convert to fraction form
   12,644,456/18,068,658 = 18,068,658/x
3. Step 3: Cross multiply
   12,644,456x = 18,068,658 × 18,068,658
4. Step 4: Simplify right side
   12,644,456x = 326,476,401,920,964
5. Step 5: Solve for x
   x = 326,476,401,920,964/12,644,456
6. Step 6: Final answer
   x = 25,819,727.00