Finding the Fourth Proportional to 13,083.69, 18,055.41 and 7,115.37

Step by Step Solution

1. Step 1: Write the proportion equation
   13,083.69 : 18,055.41 = 7,115.37 : x
2. Step 2: Convert to fraction form
   13,083.69/18,055.41 = 7,115.37/x
3. Step 3: Cross multiply
   13,083.69x = 18,055.41 × 7,115.37
4. Step 4: Simplify right side
   13,083.69x = 128,470,922.65
5. Step 5: Solve for x
   x = 128,470,922.65/13,083.69
6. Step 6: Final answer
   x = 9,819.17