Finding the Third Proportional to 427,458 and 667,066.50

Step by Step Solution

1. Step 1: Write the proportion equation
   427,458 : 667,066.50 = 667,066.50 : x
2. Step 2: Convert to fraction form
   427,458/667,066.50 = 667,066.50/x
3. Step 3: Cross multiply
   427,458x = 667,066.50 × 667,066.50
4. Step 4: Simplify right side
   427,458x = 444,977,715,422.25
5. Step 5: Solve for x
   x = 444,977,715,422.25/427,458
6. Step 6: Final answer
   x = 1,040,985.82