Finding the Third Proportional to 3,906,876 and 8,445,390

Step by Step Solution

1. Step 1: Write the proportion equation
   3,906,876 : 8,445,390 = 8,445,390 : x
2. Step 2: Convert to fraction form
   3,906,876/8,445,390 = 8,445,390/x
3. Step 3: Cross multiply
   3,906,876x = 8,445,390 × 8,445,390
4. Step 4: Simplify right side
   3,906,876x = 71,324,612,252,100
5. Step 5: Solve for x
   x = 71,324,612,252,100/3,906,876
6. Step 6: Final answer
   x = 18,256,175.07