Finding the Fourth Proportional to 16,696.09, 23,039.89 and 9,142.28

Step by Step Solution

1. Step 1: Write the proportion equation
   16,696.09 : 23,039.89 = 9,142.28 : x
2. Step 2: Convert to fraction form
   16,696.09/23,039.89 = 9,142.28/x
3. Step 3: Cross multiply
   16,696.09x = 23,039.89 × 9,142.28
4. Step 4: Simplify right side
   16,696.09x = 210,637,125.55
5. Step 5: Solve for x
   x = 210,637,125.55/16,696.09
6. Step 6: Final answer
   x = 12,615.96