Finding the Fourth Proportional to 11,608.72, 16,028.37 and 7,138.48

Step by Step Solution

1. Step 1: Write the proportion equation
   11,608.72 : 16,028.37 = 7,138.48 : x
2. Step 2: Convert to fraction form
   11,608.72/16,028.37 = 7,138.48/x
3. Step 3: Cross multiply
   11,608.72x = 16,028.37 × 7,138.48
4. Step 4: Simplify right side
   11,608.72x = 114,418,198.68
5. Step 5: Solve for x
   x = 114,418,198.68/11,608.72
6. Step 6: Final answer
   x = 9,856.23