Finding the Fourth Proportional to 12,976.25, 19,413.78 and 9,865.25

Step by Step Solution

1. Step 1: Write the proportion equation
   12,976.25 : 19,413.78 = 9,865.25 : x
2. Step 2: Convert to fraction form
   12,976.25/19,413.78 = 9,865.25/x
3. Step 3: Cross multiply
   12,976.25x = 19,413.78 × 9,865.25
4. Step 4: Simplify right side
   12,976.25x = 191,521,793.15
5. Step 5: Solve for x
   x = 191,521,793.15/12,976.25
6. Step 6: Final answer
   x = 14,759.41