Finding the Third Proportional to 100,573.31 and 209,413.69

Step by Step Solution

1. Step 1: Write the proportion equation
   100,573.31 : 209,413.69 = 209,413.69 : x
2. Step 2: Convert to fraction form
   100,573.31/209,413.69 = 209,413.69/x
3. Step 3: Cross multiply
   100,573.31x = 209,413.69 × 209,413.69
4. Step 4: Simplify right side
   100,573.31x = 43,854,092,512.35
5. Step 5: Solve for x
   x = 43,854,092,512.35/100,573.31
6. Step 6: Final answer
   x = 436,041.05