Finding the Third Proportional to 365,560.50 and 489,008

Step by Step Solution

1. Step 1: Write the proportion equation
   365,560.50 : 489,008 = 489,008 : x
2. Step 2: Convert to fraction form
   365,560.50/489,008 = 489,008/x
3. Step 3: Cross multiply
   365,560.50x = 489,008 × 489,008
4. Step 4: Simplify right side
   365,560.50x = 239,128,824,064
5. Step 5: Solve for x
   x = 239,128,824,064/365,560.50
6. Step 6: Final answer
   x = 654,142.95