Finding the Fourth Proportional to 18,109, 27,171.74 and 10,728.04

Step by Step Solution

1. Step 1: Write the proportion equation
   18,109 : 27,171.74 = 10,728.04 : x
2. Step 2: Convert to fraction form
   18,109/27,171.74 = 10,728.04/x
3. Step 3: Cross multiply
   18,109x = 27,171.74 × 10,728.04
4. Step 4: Simplify right side
   18,109x = 291,499,513.59
5. Step 5: Solve for x
   x = 291,499,513.59/18,109
6. Step 6: Final answer
   x = 16,096.94