Finding the Third Proportional to 51,072,990 and 71,665,519

Step by Step Solution

1. Step 1: Write the proportion equation
   51,072,990 : 71,665,519 = 71,665,519 : x
2. Step 2: Convert to fraction form
   51,072,990/71,665,519 = 71,665,519/x
3. Step 3: Cross multiply
   51,072,990x = 71,665,519 × 71,665,519
4. Step 4: Simplify right side
   51,072,990x = 5,135,946,613,539,361
5. Step 5: Solve for x
   x = 5,135,946,613,539,361/51,072,990
6. Step 6: Final answer
   x = 100,560,915.14