Finding the Third Proportional to 3,969,642 and 8,611,422

Step by Step Solution

1. Step 1: Write the proportion equation
   3,969,642 : 8,611,422 = 8,611,422 : x
2. Step 2: Convert to fraction form
   3,969,642/8,611,422 = 8,611,422/x
3. Step 3: Cross multiply
   3,969,642x = 8,611,422 × 8,611,422
4. Step 4: Simplify right side
   3,969,642x = 74,156,588,862,084
5. Step 5: Solve for x
   x = 74,156,588,862,084/3,969,642
6. Step 6: Final answer
   x = 18,680,926.10