Finding the Fourth Proportional to 11,979.54, 16,533.72 and 9,141.54

Step by Step Solution

1. Step 1: Write the proportion equation
   11,979.54 : 16,533.72 = 9,141.54 : x
2. Step 2: Convert to fraction form
   11,979.54/16,533.72 = 9,141.54/x
3. Step 3: Cross multiply
   11,979.54x = 16,533.72 × 9,141.54
4. Step 4: Simplify right side
   11,979.54x = 151,143,662.73
5. Step 5: Solve for x
   x = 151,143,662.73/11,979.54
6. Step 6: Final answer
   x = 12,616.82