Finding the Fourth Proportional to 16,851.50, 23,255.79 and 9,399.50

Step by Step Solution

1. Step 1: Write the proportion equation
   16,851.50 : 23,255.79 = 9,399.50 : x
2. Step 2: Convert to fraction form
   16,851.50/23,255.79 = 9,399.50/x
3. Step 3: Cross multiply
   16,851.50x = 23,255.79 × 9,399.50
4. Step 4: Simplify right side
   16,851.50x = 218,592,798.11
5. Step 5: Solve for x
   x = 218,592,798.11/16,851.50
6. Step 6: Final answer
   x = 12,971.71