Finding the Fourth Proportional to 16,696.16, 23,039.67 and 9,142.58

Step by Step Solution

1. Step 1: Write the proportion equation
   16,696.16 : 23,039.67 = 9,142.58 : x
2. Step 2: Convert to fraction form
   16,696.16/23,039.67 = 9,142.58/x
3. Step 3: Cross multiply
   16,696.16x = 23,039.67 × 9,142.58
4. Step 4: Simplify right side
   16,696.16x = 210,641,945.23
5. Step 5: Solve for x
   x = 210,641,945.23/16,696.16
6. Step 6: Final answer
   x = 12,616.19