Finding the Third Proportional to 328,020 and 489,498.50

Step by Step Solution

1. Step 1: Write the proportion equation
   328,020 : 489,498.50 = 489,498.50 : x
2. Step 2: Convert to fraction form
   328,020/489,498.50 = 489,498.50/x
3. Step 3: Cross multiply
   328,020x = 489,498.50 × 489,498.50
4. Step 4: Simplify right side
   328,020x = 239,608,781,502.25
5. Step 5: Solve for x
   x = 239,608,781,502.25/328,020
6. Step 6: Final answer
   x = 730,470.04