Finding the Fourth Proportional to 11,785.92, 16,270.56 and 11,142.72

Step by Step Solution

1. Step 1: Write the proportion equation
   11,785.92 : 16,270.56 = 11,142.72 : x
2. Step 2: Convert to fraction form
   11,785.92/16,270.56 = 11,142.72/x
3. Step 3: Cross multiply
   11,785.92x = 16,270.56 × 11,142.72
4. Step 4: Simplify right side
   11,785.92x = 181,298,294.32
5. Step 5: Solve for x
   x = 181,298,294.32/11,785.92
6. Step 6: Final answer
   x = 15,382.62