Finding the Third Proportional to 328,990.50 and 495,918

Step by Step Solution

1. Step 1: Write the proportion equation
   328,990.50 : 495,918 = 495,918 : x
2. Step 2: Convert to fraction form
   328,990.50/495,918 = 495,918/x
3. Step 3: Cross multiply
   328,990.50x = 495,918 × 495,918
4. Step 4: Simplify right side
   328,990.50x = 245,934,662,724
5. Step 5: Solve for x
   x = 245,934,662,724/328,990.50
6. Step 6: Final answer
   x = 747,543.36