Finding the Third Proportional to 311,436 and 481,166

Step by Step Solution

1. Step 1: Write the proportion equation
   311,436 : 481,166 = 481,166 : x
2. Step 2: Convert to fraction form
   311,436/481,166 = 481,166/x
3. Step 3: Cross multiply
   311,436x = 481,166 × 481,166
4. Step 4: Simplify right side
   311,436x = 231,520,719,556
5. Step 5: Solve for x
   x = 231,520,719,556/311,436
6. Step 6: Final answer
   x = 743,397.42