Finding the Third Proportional to 3,964,413 and 8,656,895

Step by Step Solution

1. Step 1: Write the proportion equation
   3,964,413 : 8,656,895 = 8,656,895 : x
2. Step 2: Convert to fraction form
   3,964,413/8,656,895 = 8,656,895/x
3. Step 3: Cross multiply
   3,964,413x = 8,656,895 × 8,656,895
4. Step 4: Simplify right side
   3,964,413x = 74,941,831,041,025
5. Step 5: Solve for x
   x = 74,941,831,041,025/3,964,413
6. Step 6: Final answer
   x = 18,903,638.71