Finding the Fourth Proportional to 13,112.69, 18,095.72 and 7,144.36

Step by Step Solution

1. Step 1: Write the proportion equation
   13,112.69 : 18,095.72 = 7,144.36 : x
2. Step 2: Convert to fraction form
   13,112.69/18,095.72 = 7,144.36/x
3. Step 3: Cross multiply
   13,112.69x = 18,095.72 × 7,144.36
4. Step 4: Simplify right side
   13,112.69x = 129,282,297.37
5. Step 5: Solve for x
   x = 129,282,297.37/13,112.69
6. Step 6: Final answer
   x = 9,859.33