Finding the Fourth Proportional to 12,196.72, 18,296.16 and 3,431.71

Step by Step Solution

1. Step 1: Write the proportion equation
   12,196.72 : 18,296.16 = 3,431.71 : x
2. Step 2: Convert to fraction form
   12,196.72/18,296.16 = 3,431.71/x
3. Step 3: Cross multiply
   12,196.72x = 18,296.16 × 3,431.71
4. Step 4: Simplify right side
   12,196.72x = 62,787,115.23
5. Step 5: Solve for x
   x = 62,787,115.23/12,196.72
6. Step 6: Final answer
   x = 5,147.87