Finding the Fourth Proportional to 13,096.38, 18,072.41 and 7,128.03

Step by Step Solution

1. Step 1: Write the proportion equation
   13,096.38 : 18,072.41 = 7,128.03 : x
2. Step 2: Convert to fraction form
   13,096.38/18,072.41 = 7,128.03/x
3. Step 3: Cross multiply
   13,096.38x = 18,072.41 × 7,128.03
4. Step 4: Simplify right side
   13,096.38x = 128,820,680.65
5. Step 5: Solve for x
   x = 128,820,680.65/13,096.38
6. Step 6: Final answer
   x = 9,836.36