Finding the Third Proportional to 328,579.50 and 494,328

Step by Step Solution

1. Step 1: Write the proportion equation
   328,579.50 : 494,328 = 494,328 : x
2. Step 2: Convert to fraction form
   328,579.50/494,328 = 494,328/x
3. Step 3: Cross multiply
   328,579.50x = 494,328 × 494,328
4. Step 4: Simplify right side
   328,579.50x = 244,360,171,584
5. Step 5: Solve for x
   x = 244,360,171,584/328,579.50
6. Step 6: Final answer
   x = 743,686.60