Finding the Fourth Proportional to 16,570.99, 22,862.81 and 9,399.72

Step by Step Solution

1. Step 1: Write the proportion equation
   16,570.99 : 22,862.81 = 9,399.72 : x
2. Step 2: Convert to fraction form
   16,570.99/22,862.81 = 9,399.72/x
3. Step 3: Cross multiply
   16,570.99x = 22,862.81 × 9,399.72
4. Step 4: Simplify right side
   16,570.99x = 214,904,035.91
5. Step 5: Solve for x
   x = 214,904,035.91/16,570.99
6. Step 6: Final answer
   x = 12,968.69