Finding the Fourth Proportional to 21,829.50, 30,124.71 and 11,893.50

Step by Step Solution

1. Step 1: Write the proportion equation
   21,829.50 : 30,124.71 = 11,893.50 : x
2. Step 2: Convert to fraction form
   21,829.50/30,124.71 = 11,893.50/x
3. Step 3: Cross multiply
   21,829.50x = 30,124.71 × 11,893.50
4. Step 4: Simplify right side
   21,829.50x = 358,288,238.39
5. Step 5: Solve for x
   x = 358,288,238.39/21,829.50
6. Step 6: Final answer
   x = 16,413.03