Finding the Fourth Proportional to 12,942.30, 19,413.54 and 5,540.52

Step by Step Solution

1. Step 1: Write the proportion equation
   12,942.30 : 19,413.54 = 5,540.52 : x
2. Step 2: Convert to fraction form
   12,942.30/19,413.54 = 5,540.52/x
3. Step 3: Cross multiply
   12,942.30x = 19,413.54 × 5,540.52
4. Step 4: Simplify right side
   12,942.30x = 107,561,106.64
5. Step 5: Solve for x
   x = 107,561,106.64/12,942.30
6. Step 6: Final answer
   x = 8,310.82