Finding the Third Proportional to 443,140 and 669,996

Step by Step Solution

1. Step 1: Write the proportion equation
   443,140 : 669,996 = 669,996 : x
2. Step 2: Convert to fraction form
   443,140/669,996 = 669,996/x
3. Step 3: Cross multiply
   443,140x = 669,996 × 669,996
4. Step 4: Simplify right side
   443,140x = 448,894,640,016
5. Step 5: Solve for x
   x = 448,894,640,016/443,140
6. Step 6: Final answer
   x = 1,012,986.05