Finding the Third Proportional to 3,969,636 and 8,611,410

Step by Step Solution

1. Step 1: Write the proportion equation
   3,969,636 : 8,611,410 = 8,611,410 : x
2. Step 2: Convert to fraction form
   3,969,636/8,611,410 = 8,611,410/x
3. Step 3: Cross multiply
   3,969,636x = 8,611,410 × 8,611,410
4. Step 4: Simplify right side
   3,969,636x = 74,156,382,188,100
5. Step 5: Solve for x
   x = 74,156,382,188,100/3,969,636
6. Step 6: Final answer
   x = 18,680,902.28