Finding the Third Proportional to 406,440 and 632,919.50

Step by Step Solution

1. Step 1: Write the proportion equation
   406,440 : 632,919.50 = 632,919.50 : x
2. Step 2: Convert to fraction form
   406,440/632,919.50 = 632,919.50/x
3. Step 3: Cross multiply
   406,440x = 632,919.50 × 632,919.50
4. Step 4: Simplify right side
   406,440x = 400,587,093,480.25
5. Step 5: Solve for x
   x = 400,587,093,480.25/406,440
6. Step 6: Final answer
   x = 985,599.58