Finding the Fourth Proportional to 13,096.56, 18,072.70 and 7,128.24

Step by Step Solution

1. Step 1: Write the proportion equation
   13,096.56 : 18,072.70 = 7,128.24 : x
2. Step 2: Convert to fraction form
   13,096.56/18,072.70 = 7,128.24/x
3. Step 3: Cross multiply
   13,096.56x = 18,072.70 × 7,128.24
4. Step 4: Simplify right side
   13,096.56x = 128,826,543.05
5. Step 5: Solve for x
   x = 128,826,543.05/13,096.56
6. Step 6: Final answer
   x = 9,836.67