Finding the Fourth Proportional to 13,096.69, 18,073.46 and 7,128.41

Step by Step Solution

1. Step 1: Write the proportion equation
   13,096.69 : 18,073.46 = 7,128.41 : x
2. Step 2: Convert to fraction form
   13,096.69/18,073.46 = 7,128.41/x
3. Step 3: Cross multiply
   13,096.69x = 18,073.46 × 7,128.41
4. Step 4: Simplify right side
   13,096.69x = 128,834,960.45
5. Step 5: Solve for x
   x = 128,834,960.45/13,096.69
6. Step 6: Final answer
   x = 9,837.22