Finding the Third Proportional to 327,404.50 and 489,090

Step by Step Solution

1. Step 1: Write the proportion equation
   327,404.50 : 489,090 = 489,090 : x
2. Step 2: Convert to fraction form
   327,404.50/489,090 = 489,090/x
3. Step 3: Cross multiply
   327,404.50x = 489,090 × 489,090
4. Step 4: Simplify right side
   327,404.50x = 239,209,028,100
5. Step 5: Solve for x
   x = 239,209,028,100/327,404.50
6. Step 6: Final answer
   x = 730,622.30