Finding the Fourth Proportional to 12,196.28, 18,191.38 and 11,827.10

Step by Step Solution

1. Step 1: Write the proportion equation
   12,196.28 : 18,191.38 = 11,827.10 : x
2. Step 2: Convert to fraction form
   12,196.28/18,191.38 = 11,827.10/x
3. Step 3: Cross multiply
   12,196.28x = 18,191.38 × 11,827.10
4. Step 4: Simplify right side
   12,196.28x = 215,151,270.40
5. Step 5: Solve for x
   x = 215,151,270.40/12,196.28
6. Step 6: Final answer
   x = 17,640.73