Finding the Third Proportional to 419,436 and 667,158

Step by Step Solution

1. Step 1: Write the proportion equation
   419,436 : 667,158 = 667,158 : x
2. Step 2: Convert to fraction form
   419,436/667,158 = 667,158/x
3. Step 3: Cross multiply
   419,436x = 667,158 × 667,158
4. Step 4: Simplify right side
   419,436x = 445,099,796,964
5. Step 5: Solve for x
   x = 445,099,796,964/419,436
6. Step 6: Final answer
   x = 1,061,186.44