Finding the Fourth Proportional to 30,919.24, 42,667.41 and 16,771.78

Step by Step Solution

1. Step 1: Write the proportion equation
   30,919.24 : 42,667.41 = 16,771.78 : x
2. Step 2: Convert to fraction form
   30,919.24/42,667.41 = 16,771.78/x
3. Step 3: Cross multiply
   30,919.24x = 42,667.41 × 16,771.78
4. Step 4: Simplify right side
   30,919.24x = 715,608,413.69
5. Step 5: Solve for x
   x = 715,608,413.69/30,919.24
6. Step 6: Final answer
   x = 23,144.44