Finding the Third Proportional to 406,300.50 and 629,992.50

Step by Step Solution

1. Step 1: Write the proportion equation
   406,300.50 : 629,992.50 = 629,992.50 : x
2. Step 2: Convert to fraction form
   406,300.50/629,992.50 = 629,992.50/x
3. Step 3: Cross multiply
   406,300.50x = 629,992.50 × 629,992.50
4. Step 4: Simplify right side
   406,300.50x = 396,890,550,056.25
5. Step 5: Solve for x
   x = 396,890,550,056.25/406,300.50
6. Step 6: Final answer
   x = 976,839.93