Finding the Third Proportional to 13,245,544,871 and 20,359,352,099

Step by Step Solution

1. Step 1: Write the proportion equation
   13,245,544,871 : 20,359,352,099 = 20,359,352,099 : x
2. Step 2: Convert to fraction form
   13,245,544,871/20,359,352,099 = 20,359,352,099/x
3. Step 3: Cross multiply
   13,245,544,871x = 20,359,352,099 × 20,359,352,099
4. Step 4: Simplify right side
   13,245,544,871x = 414,503,217,891,055,697,920
5. Step 5: Solve for x
   x = 414,503,217,891,055,697,920/13,245,544,871
6. Step 6: Final answer
   x = 31,293,783,829.05