Finding the Fourth Proportional to 12,152.73, 16,661.39 and 11,931.30

Step by Step Solution

1. Step 1: Write the proportion equation
   12,152.73 : 16,661.39 = 11,931.30 : x
2. Step 2: Convert to fraction form
   12,152.73/16,661.39 = 11,931.30/x
3. Step 3: Cross multiply
   12,152.73x = 16,661.39 × 11,931.30
4. Step 4: Simplify right side
   12,152.73x = 198,792,042.51
5. Step 5: Solve for x
   x = 198,792,042.51/12,152.73
6. Step 6: Final answer
   x = 16,357.81