Finding the Fourth Proportional to 31,413.27, 47,119.82 and 12,693.09

Step by Step Solution

1. Step 1: Write the proportion equation
   31,413.27 : 47,119.82 = 12,693.09 : x
2. Step 2: Convert to fraction form
   31,413.27/47,119.82 = 12,693.09/x
3. Step 3: Cross multiply
   31,413.27x = 47,119.82 × 12,693.09
4. Step 4: Simplify right side
   31,413.27x = 598,096,229.28
5. Step 5: Solve for x
   x = 598,096,229.28/31,413.27
6. Step 6: Final answer
   x = 19,039.60