Finding the Third Proportional to 419,431 and 667,150.50

Step by Step Solution

1. Step 1: Write the proportion equation
   419,431 : 667,150.50 = 667,150.50 : x
2. Step 2: Convert to fraction form
   419,431/667,150.50 = 667,150.50/x
3. Step 3: Cross multiply
   419,431x = 667,150.50 × 667,150.50
4. Step 4: Simplify right side
   419,431x = 445,089,789,650.25
5. Step 5: Solve for x
   x = 445,089,789,650.25/419,431
6. Step 6: Final answer
   x = 1,061,175.23