Finding the Fourth Proportional to 11,309.54, 16,940.37 and 7,147.42

Step by Step Solution

1. Step 1: Write the proportion equation
   11,309.54 : 16,940.37 = 7,147.42 : x
2. Step 2: Convert to fraction form
   11,309.54/16,940.37 = 7,147.42/x
3. Step 3: Cross multiply
   11,309.54x = 16,940.37 × 7,147.42
4. Step 4: Simplify right side
   11,309.54x = 121,079,939.35
5. Step 5: Solve for x
   x = 121,079,939.35/11,309.54
6. Step 6: Final answer
   x = 10,706.00