Finding the Fourth Proportional to 16,155.30, 22,293.60 and 8,985.72

Step by Step Solution

1. Step 1: Write the proportion equation
   16,155.30 : 22,293.60 = 8,985.72 : x
2. Step 2: Convert to fraction form
   16,155.30/22,293.60 = 8,985.72/x
3. Step 3: Cross multiply
   16,155.30x = 22,293.60 × 8,985.72
4. Step 4: Simplify right side
   16,155.30x = 200,324,047.39
5. Step 5: Solve for x
   x = 200,324,047.39/16,155.30
6. Step 6: Final answer
   x = 12,399.90