Finding the Third Proportional to 30,378.50 and 65,413.75

Step by Step Solution

1. Step 1: Write the proportion equation
   30,378.50 : 65,413.75 = 65,413.75 : x
2. Step 2: Convert to fraction form
   30,378.50/65,413.75 = 65,413.75/x
3. Step 3: Cross multiply
   30,378.50x = 65,413.75 × 65,413.75
4. Step 4: Simplify right side
   30,378.50x = 4,278,958,689.06
5. Step 5: Solve for x
   x = 4,278,958,689.06/30,378.50
6. Step 6: Final answer
   x = 140,854.84