Finding the Third Proportional to 3,953,778 and 8,677,380

Step by Step Solution

1. Step 1: Write the proportion equation
   3,953,778 : 8,677,380 = 8,677,380 : x
2. Step 2: Convert to fraction form
   3,953,778/8,677,380 = 8,677,380/x
3. Step 3: Cross multiply
   3,953,778x = 8,677,380 × 8,677,380
4. Step 4: Simplify right side
   3,953,778x = 75,296,923,664,400
5. Step 5: Solve for x
   x = 75,296,923,664,400/3,953,778
6. Step 6: Final answer
   x = 19,044,297.29