Finding the Fourth Proportional to 13,196.18, 18,219.18 and 11,777.42

Step by Step Solution

1. Step 1: Write the proportion equation
   13,196.18 : 18,219.18 = 11,777.42 : x
2. Step 2: Convert to fraction form
   13,196.18/18,219.18 = 11,777.42/x
3. Step 3: Cross multiply
   13,196.18x = 18,219.18 × 11,777.42
4. Step 4: Simplify right side
   13,196.18x = 214,574,934.92
5. Step 5: Solve for x
   x = 214,574,934.92/13,196.18
6. Step 6: Final answer
   x = 16,260.38