Finding the Fourth Proportional to 13,072.69, 18,040.43 and 7,104.42

Step by Step Solution

1. Step 1: Write the proportion equation
   13,072.69 : 18,040.43 = 7,104.42 : x
2. Step 2: Convert to fraction form
   13,072.69/18,040.43 = 7,104.42/x
3. Step 3: Cross multiply
   13,072.69x = 18,040.43 × 7,104.42
4. Step 4: Simplify right side
   13,072.69x = 128,166,791.70
5. Step 5: Solve for x
   x = 128,166,791.70/13,072.69
6. Step 6: Final answer
   x = 9,804.16