Finding the Third Proportional to 311,418 and 443,793

Step by Step Solution

1. Step 1: Write the proportion equation
   311,418 : 443,793 = 443,793 : x
2. Step 2: Convert to fraction form
   311,418/443,793 = 443,793/x
3. Step 3: Cross multiply
   311,418x = 443,793 × 443,793
4. Step 4: Simplify right side
   311,418x = 196,952,226,849
5. Step 5: Solve for x
   x = 196,952,226,849/311,418
6. Step 6: Final answer
   x = 632,436.88