Finding the Fourth Proportional to 13,107.78, 18,086.67 and 8,072.82

Step by Step Solution

1. Step 1: Write the proportion equation
   13,107.78 : 18,086.67 = 8,072.82 : x
2. Step 2: Convert to fraction form
   13,107.78/18,086.67 = 8,072.82/x
3. Step 3: Cross multiply
   13,107.78x = 18,086.67 × 8,072.82
4. Step 4: Simplify right side
   13,107.78x = 146,010,431.31
5. Step 5: Solve for x
   x = 146,010,431.31/13,107.78
6. Step 6: Final answer
   x = 11,139.22