Finding the Third Proportional to 336,308 and 491,530

Step by Step Solution

1. Step 1: Write the proportion equation
   336,308 : 491,530 = 491,530 : x
2. Step 2: Convert to fraction form
   336,308/491,530 = 491,530/x
3. Step 3: Cross multiply
   336,308x = 491,530 × 491,530
4. Step 4: Simplify right side
   336,308x = 241,601,740,900
5. Step 5: Solve for x
   x = 241,601,740,900/336,308
6. Step 6: Final answer
   x = 718,394.27