Finding the Third Proportional to 155,540 and 320,895

Step by Step Solution

1. Step 1: Write the proportion equation
   155,540 : 320,895 = 320,895 : x
2. Step 2: Convert to fraction form
   155,540/320,895 = 320,895/x
3. Step 3: Cross multiply
   155,540x = 320,895 × 320,895
4. Step 4: Simplify right side
   155,540x = 102,973,601,025
5. Step 5: Solve for x
   x = 102,973,601,025/155,540
6. Step 6: Final answer
   x = 662,039.35