Finding the Fourth Proportional to 11,105.38, 16,666.81 and 5,179.22

Step by Step Solution

1. Step 1: Write the proportion equation
   11,105.38 : 16,666.81 = 5,179.22 : x
2. Step 2: Convert to fraction form
   11,105.38/16,666.81 = 5,179.22/x
3. Step 3: Cross multiply
   11,105.38x = 16,666.81 × 5,179.22
4. Step 4: Simplify right side
   11,105.38x = 86,320,979.41
5. Step 5: Solve for x
   x = 86,320,979.41/11,105.38
6. Step 6: Final answer
   x = 7,772.90