Finding the Third Proportional to 291,311 and 443,048

Step by Step Solution

1. Step 1: Write the proportion equation
   291,311 : 443,048 = 443,048 : x
2. Step 2: Convert to fraction form
   291,311/443,048 = 443,048/x
3. Step 3: Cross multiply
   291,311x = 443,048 × 443,048
4. Step 4: Simplify right side
   291,311x = 196,291,530,304
5. Step 5: Solve for x
   x = 196,291,530,304/291,311
6. Step 6: Final answer
   x = 673,821.21