Finding the Third Proportional to 435,918 and 666,556.50

Step by Step Solution

1. Step 1: Write the proportion equation
   435,918 : 666,556.50 = 666,556.50 : x
2. Step 2: Convert to fraction form
   435,918/666,556.50 = 666,556.50/x
3. Step 3: Cross multiply
   435,918x = 666,556.50 × 666,556.50
4. Step 4: Simplify right side
   435,918x = 444,297,567,692.25
5. Step 5: Solve for x
   x = 444,297,567,692.25/435,918
6. Step 6: Final answer
   x = 1,019,222.81