Finding the Third Proportional to 357,048 and 489,595.50

Step by Step Solution

1. Step 1: Write the proportion equation
   357,048 : 489,595.50 = 489,595.50 : x
2. Step 2: Convert to fraction form
   357,048/489,595.50 = 489,595.50/x
3. Step 3: Cross multiply
   357,048x = 489,595.50 × 489,595.50
4. Step 4: Simplify right side
   357,048x = 239,703,753,620.25
5. Step 5: Solve for x
   x = 239,703,753,620.25/357,048
6. Step 6: Final answer
   x = 671,348.82