Finding the Third Proportional to 406,949 and 630,871.50

Step by Step Solution

1. Step 1: Write the proportion equation
   406,949 : 630,871.50 = 630,871.50 : x
2. Step 2: Convert to fraction form
   406,949/630,871.50 = 630,871.50/x
3. Step 3: Cross multiply
   406,949x = 630,871.50 × 630,871.50
4. Step 4: Simplify right side
   406,949x = 397,998,849,512.25
5. Step 5: Solve for x
   x = 397,998,849,512.25/406,949
6. Step 6: Final answer
   x = 978,006.70