Finding the Fourth Proportional to 12,311.78, 18,550.78 and 10,168.52

Step by Step Solution

1. Step 1: Write the proportion equation
   12,311.78 : 18,550.78 = 10,168.52 : x
2. Step 2: Convert to fraction form
   12,311.78/18,550.78 = 10,168.52/x
3. Step 3: Cross multiply
   12,311.78x = 18,550.78 × 10,168.52
4. Step 4: Simplify right side
   12,311.78x = 188,633,926.60
5. Step 5: Solve for x
   x = 188,633,926.60/12,311.78
6. Step 6: Final answer
   x = 15,321.42