Finding the Third Proportional to 366,870.50 and 489,206

Step by Step Solution

1. Step 1: Write the proportion equation
   366,870.50 : 489,206 = 489,206 : x
2. Step 2: Convert to fraction form
   366,870.50/489,206 = 489,206/x
3. Step 3: Cross multiply
   366,870.50x = 489,206 × 489,206
4. Step 4: Simplify right side
   366,870.50x = 239,322,510,436
5. Step 5: Solve for x
   x = 239,322,510,436/366,870.50
6. Step 6: Final answer
   x = 652,335.12