Finding the Third Proportional to 450,558 and 629,910

Step by Step Solution

1. Step 1: Write the proportion equation
   450,558 : 629,910 = 629,910 : x
2. Step 2: Convert to fraction form
   450,558/629,910 = 629,910/x
3. Step 3: Cross multiply
   450,558x = 629,910 × 629,910
4. Step 4: Simplify right side
   450,558x = 396,786,608,100
5. Step 5: Solve for x
   x = 396,786,608,100/450,558
6. Step 6: Final answer
   x = 880,656.00