Finding the Fourth Proportional to 11,198.42, 16,765.20 and 8,436.72

Step by Step Solution

1. Step 1: Write the proportion equation
   11,198.42 : 16,765.20 = 8,436.72 : x
2. Step 2: Convert to fraction form
   11,198.42/16,765.20 = 8,436.72/x
3. Step 3: Cross multiply
   11,198.42x = 16,765.20 × 8,436.72
4. Step 4: Simplify right side
   11,198.42x = 141,443,298.14
5. Step 5: Solve for x
   x = 141,443,298.14/11,198.42
6. Step 6: Final answer
   x = 12,630.65