Finding the Fourth Proportional to 16,691.76, 23,033.61 and 9,136.71

Step by Step Solution

1. Step 1: Write the proportion equation
   16,691.76 : 23,033.61 = 9,136.71 : x
2. Step 2: Convert to fraction form
   16,691.76/23,033.61 = 9,136.71/x
3. Step 3: Cross multiply
   16,691.76x = 23,033.61 × 9,136.71
4. Step 4: Simplify right side
   16,691.76x = 210,451,414.82
5. Step 5: Solve for x
   x = 210,451,414.82/16,691.76
6. Step 6: Final answer
   x = 12,608.10