Finding the Fourth Proportional to 16,658.72, 22,987.68 and 9,206.72

Step by Step Solution

1. Step 1: Write the proportion equation
   16,658.72 : 22,987.68 = 9,206.72 : x
2. Step 2: Convert to fraction form
   16,658.72/22,987.68 = 9,206.72/x
3. Step 3: Cross multiply
   16,658.72x = 22,987.68 × 9,206.72
4. Step 4: Simplify right side
   16,658.72x = 211,641,133.21
5. Step 5: Solve for x
   x = 211,641,133.21/16,658.72
6. Step 6: Final answer
   x = 12,704.53