Finding the Fourth Proportional to 10,913.48, 15,067.67 and 8,519.33

Step by Step Solution

1. Step 1: Write the proportion equation
   10,913.48 : 15,067.67 = 8,519.33 : x
2. Step 2: Convert to fraction form
   10,913.48/15,067.67 = 8,519.33/x
3. Step 3: Cross multiply
   10,913.48x = 15,067.67 × 8,519.33
4. Step 4: Simplify right side
   10,913.48x = 128,366,411.30
5. Step 5: Solve for x
   x = 128,366,411.30/10,913.48
6. Step 6: Final answer
   x = 11,762.18