Finding the Third Proportional to 3,939,701 and 8,487,298

Step by Step Solution

1. Step 1: Write the proportion equation
   3,939,701 : 8,487,298 = 8,487,298 : x
2. Step 2: Convert to fraction form
   3,939,701/8,487,298 = 8,487,298/x
3. Step 3: Cross multiply
   3,939,701x = 8,487,298 × 8,487,298
4. Step 4: Simplify right side
   3,939,701x = 72,034,227,340,804
5. Step 5: Solve for x
   x = 72,034,227,340,804/3,939,701
6. Step 6: Final answer
   x = 18,284,186.37