Finding the Third Proportional to 3,936,390 and 8,476,500

Step by Step Solution

1. Step 1: Write the proportion equation
   3,936,390 : 8,476,500 = 8,476,500 : x
2. Step 2: Convert to fraction form
   3,936,390/8,476,500 = 8,476,500/x
3. Step 3: Cross multiply
   3,936,390x = 8,476,500 × 8,476,500
4. Step 4: Simplify right side
   3,936,390x = 71,851,052,250,000
5. Step 5: Solve for x
   x = 71,851,052,250,000/3,936,390
6. Step 6: Final answer
   x = 18,253,031.90