Finding the Fourth Proportional to 12,196.23, 18,297.78 and 3,431.22

Step by Step Solution

1. Step 1: Write the proportion equation
   12,196.23 : 18,297.78 = 3,431.22 : x
2. Step 2: Convert to fraction form
   12,196.23/18,297.78 = 3,431.22/x
3. Step 3: Cross multiply
   12,196.23x = 18,297.78 × 3,431.22
4. Step 4: Simplify right side
   12,196.23x = 62,783,708.69
5. Step 5: Solve for x
   x = 62,783,708.69/12,196.23
6. Step 6: Final answer
   x = 5,147.80