Finding the Third Proportional to 13,425,878 and 20,648,530

Step by Step Solution

1. Step 1: Write the proportion equation
   13,425,878 : 20,648,530 = 20,648,530 : x
2. Step 2: Convert to fraction form
   13,425,878/20,648,530 = 20,648,530/x
3. Step 3: Cross multiply
   13,425,878x = 20,648,530 × 20,648,530
4. Step 4: Simplify right side
   13,425,878x = 426,361,791,160,900
5. Step 5: Solve for x
   x = 426,361,791,160,900/13,425,878
6. Step 6: Final answer
   x = 31,756,715.74