Finding the Fourth Proportional to 12,441.72, 18,648.90 and 5,413.56

Step by Step Solution

1. Step 1: Write the proportion equation
   12,441.72 : 18,648.90 = 5,413.56 : x
2. Step 2: Convert to fraction form
   12,441.72/18,648.90 = 5,413.56/x
3. Step 3: Cross multiply
   12,441.72x = 18,648.90 × 5,413.56
4. Step 4: Simplify right side
   12,441.72x = 100,956,869.15
5. Step 5: Solve for x
   x = 100,956,869.15/12,441.72
6. Step 6: Final answer
   x = 8,114.38