Finding the Fourth Proportional to 12,196.30, 18,272.58 and 11,540.20

Step by Step Solution

1. Step 1: Write the proportion equation
   12,196.30 : 18,272.58 = 11,540.20 : x
2. Step 2: Convert to fraction form
   12,196.30/18,272.58 = 11,540.20/x
3. Step 3: Cross multiply
   12,196.30x = 18,272.58 × 11,540.20
4. Step 4: Simplify right side
   12,196.30x = 210,869,227.72
5. Step 5: Solve for x
   x = 210,869,227.72/12,196.30
6. Step 6: Final answer
   x = 17,289.61