Finding the Third Proportional to 3,969,902 and 8,611,814

Step by Step Solution

1. Step 1: Write the proportion equation
   3,969,902 : 8,611,814 = 8,611,814 : x
2. Step 2: Convert to fraction form
   3,969,902/8,611,814 = 8,611,814/x
3. Step 3: Cross multiply
   3,969,902x = 8,611,814 × 8,611,814
4. Step 4: Simplify right side
   3,969,902x = 74,163,340,370,596
5. Step 5: Solve for x
   x = 74,163,340,370,596/3,969,902
6. Step 6: Final answer
   x = 18,681,403.31