Finding the Fourth Proportional to 16,540.72, 22,826.32 and 8,987.20

Step by Step Solution

1. Step 1: Write the proportion equation
   16,540.72 : 22,826.32 = 8,987.20 : x
2. Step 2: Convert to fraction form
   16,540.72/22,826.32 = 8,987.20/x
3. Step 3: Cross multiply
   16,540.72x = 22,826.32 × 8,987.20
4. Step 4: Simplify right side
   16,540.72x = 205,144,703.10
5. Step 5: Solve for x
   x = 205,144,703.10/16,540.72
6. Step 6: Final answer
   x = 12,402.40