Finding the Fourth Proportional to 13,096.38, 18,073.01 and 7,128.09

Step by Step Solution

1. Step 1: Write the proportion equation
   13,096.38 : 18,073.01 = 7,128.09 : x
2. Step 2: Convert to fraction form
   13,096.38/18,073.01 = 7,128.09/x
3. Step 3: Cross multiply
   13,096.38x = 18,073.01 × 7,128.09
4. Step 4: Simplify right side
   13,096.38x = 128,826,019.58
5. Step 5: Solve for x
   x = 128,826,019.58/13,096.38
6. Step 6: Final answer
   x = 9,836.77