Finding the Third Proportional to 328,766 and 495,039

Step by Step Solution

1. Step 1: Write the proportion equation
   328,766 : 495,039 = 495,039 : x
2. Step 2: Convert to fraction form
   328,766/495,039 = 495,039/x
3. Step 3: Cross multiply
   328,766x = 495,039 × 495,039
4. Step 4: Simplify right side
   328,766x = 245,063,611,521
5. Step 5: Solve for x
   x = 245,063,611,521/328,766
6. Step 6: Final answer
   x = 745,404.37