Finding the Fourth Proportional to 18,940.43, 28,413.83 and 5,789.72

Step by Step Solution

1. Step 1: Write the proportion equation
   18,940.43 : 28,413.83 = 5,789.72 : x
2. Step 2: Convert to fraction form
   18,940.43/28,413.83 = 5,789.72/x
3. Step 3: Cross multiply
   18,940.43x = 28,413.83 × 5,789.72
4. Step 4: Simplify right side
   18,940.43x = 164,508,161.91
5. Step 5: Solve for x
   x = 164,508,161.91/18,940.43
6. Step 6: Final answer
   x = 8,685.56