Finding the Third Proportional to 10,998,456 and 16,639,242

Step by Step Solution

1. Step 1: Write the proportion equation
   10,998,456 : 16,639,242 = 16,639,242 : x
2. Step 2: Convert to fraction form
   10,998,456/16,639,242 = 16,639,242/x
3. Step 3: Cross multiply
   10,998,456x = 16,639,242 × 16,639,242
4. Step 4: Simplify right side
   10,998,456x = 276,864,374,334,564
5. Step 5: Solve for x
   x = 276,864,374,334,564/10,998,456
6. Step 6: Final answer
   x = 25,173,021.95