Finding the Third Proportional to 155,247 and 320,404

Step by Step Solution

1. Step 1: Write the proportion equation
   155,247 : 320,404 = 320,404 : x
2. Step 2: Convert to fraction form
   155,247/320,404 = 320,404/x
3. Step 3: Cross multiply
   155,247x = 320,404 × 320,404
4. Step 4: Simplify right side
   155,247x = 102,658,723,216
5. Step 5: Solve for x
   x = 102,658,723,216/155,247
6. Step 6: Final answer
   x = 661,260.59