Finding the Third Proportional to 451,640 and 660,500

Step by Step Solution

1. Step 1: Write the proportion equation
   451,640 : 660,500 = 660,500 : x
2. Step 2: Convert to fraction form
   451,640/660,500 = 660,500/x
3. Step 3: Cross multiply
   451,640x = 660,500 × 660,500
4. Step 4: Simplify right side
   451,640x = 436,260,250,000
5. Step 5: Solve for x
   x = 436,260,250,000/451,640
6. Step 6: Final answer
   x = 965,946.88