Finding the Fourth Proportional to 19,314.29, 28,979.94 and 8,222.15

Step by Step Solution

1. Step 1: Write the proportion equation
   19,314.29 : 28,979.94 = 8,222.15 : x
2. Step 2: Convert to fraction form
   19,314.29/28,979.94 = 8,222.15/x
3. Step 3: Cross multiply
   19,314.29x = 28,979.94 × 8,222.15
4. Step 4: Simplify right side
   19,314.29x = 238,277,413.67
5. Step 5: Solve for x
   x = 238,277,413.67/19,314.29
6. Step 6: Final answer
   x = 12,336.85