Finding the Third Proportional to 3,906,657 and 8,112,690

Step by Step Solution

1. Step 1: Write the proportion equation
   3,906,657 : 8,112,690 = 8,112,690 : x
2. Step 2: Convert to fraction form
   3,906,657/8,112,690 = 8,112,690/x
3. Step 3: Cross multiply
   3,906,657x = 8,112,690 × 8,112,690
4. Step 4: Simplify right side
   3,906,657x = 65,815,739,036,100
5. Step 5: Solve for x
   x = 65,815,739,036,100/3,906,657
6. Step 6: Final answer
   x = 16,847,073.86