Finding the Third Proportional to 13,329,815,311 and 28,665,721,981

Step by Step Solution

1. Step 1: Write the proportion equation
   13,329,815,311 : 28,665,721,981 = 28,665,721,981 : x
2. Step 2: Convert to fraction form
   13,329,815,311/28,665,721,981 = 28,665,721,981/x
3. Step 3: Cross multiply
   13,329,815,311x = 28,665,721,981 × 28,665,721,981
4. Step 4: Simplify right side
   13,329,815,311x = 821,723,616,691,986,628,608
5. Step 5: Solve for x
   x = 821,723,616,691,986,628,608/13,329,815,311
6. Step 6: Final answer
   x = 61,645,536,529.97