Finding the Third Proportional to 311,417 and 443,791

Step by Step Solution

1. Step 1: Write the proportion equation
   311,417 : 443,791 = 443,791 : x
2. Step 2: Convert to fraction form
   311,417/443,791 = 443,791/x
3. Step 3: Cross multiply
   311,417x = 443,791 × 443,791
4. Step 4: Simplify right side
   311,417x = 196,950,451,681
5. Step 5: Solve for x
   x = 196,950,451,681/311,417
6. Step 6: Final answer
   x = 632,433.21