Finding the Fourth Proportional to 10,911.36, 16,367 and 3,120.16

Step by Step Solution

1. Step 1: Write the proportion equation
   10,911.36 : 16,367 = 3,120.16 : x
2. Step 2: Convert to fraction form
   10,911.36/16,367 = 3,120.16/x
3. Step 3: Cross multiply
   10,911.36x = 16,367 × 3,120.16
4. Step 4: Simplify right side
   10,911.36x = 51,067,658.72
5. Step 5: Solve for x
   x = 51,067,658.72/10,911.36
6. Step 6: Final answer
   x = 4,680.23