Finding the Fourth Proportional to 16,413.05, 24,613.50 and 12,909.88

Step by Step Solution

1. Step 1: Write the proportion equation
   16,413.05 : 24,613.50 = 12,909.88 : x
2. Step 2: Convert to fraction form
   16,413.05/24,613.50 = 12,909.88/x
3. Step 3: Cross multiply
   16,413.05x = 24,613.50 × 12,909.88
4. Step 4: Simplify right side
   16,413.05x = 317,757,208.31
5. Step 5: Solve for x
   x = 317,757,208.31/16,413.05
6. Step 6: Final answer
   x = 19,360.03