Finding the Fourth Proportional to 16,487.72, 22,754.18 and 9,315.15

Step by Step Solution

1. Step 1: Write the proportion equation
   16,487.72 : 22,754.18 = 9,315.15 : x
2. Step 2: Convert to fraction form
   16,487.72/22,754.18 = 9,315.15/x
3. Step 3: Cross multiply
   16,487.72x = 22,754.18 × 9,315.15
4. Step 4: Simplify right side
   16,487.72x = 211,958,581.69
5. Step 5: Solve for x
   x = 211,958,581.69/16,487.72
6. Step 6: Final answer
   x = 12,855.54