Finding the Fourth Proportional to 15,144.86, 20,902.42 and 8,856.02

Step by Step Solution

1. Step 1: Write the proportion equation
   15,144.86 : 20,902.42 = 8,856.02 : x
2. Step 2: Convert to fraction form
   15,144.86/20,902.42 = 8,856.02/x
3. Step 3: Cross multiply
   15,144.86x = 20,902.42 × 8,856.02
4. Step 4: Simplify right side
   15,144.86x = 185,112,249.57
5. Step 5: Solve for x
   x = 185,112,249.57/15,144.86
6. Step 6: Final answer
   x = 12,222.78