Finding the Fourth Proportional to 10,818.69, 16,185.35 and 8,193.78

Step by Step Solution

1. Step 1: Write the proportion equation
   10,818.69 : 16,185.35 = 8,193.78 : x
2. Step 2: Convert to fraction form
   10,818.69/16,185.35 = 8,193.78/x
3. Step 3: Cross multiply
   10,818.69x = 16,185.35 × 8,193.78
4. Step 4: Simplify right side
   10,818.69x = 132,619,197.12
5. Step 5: Solve for x
   x = 132,619,197.12/10,818.69
6. Step 6: Final answer
   x = 12,258.34