Finding the Fourth Proportional to 12,196.41, 18,294.20 and 5,171.90

Step by Step Solution

1. Step 1: Write the proportion equation
   12,196.41 : 18,294.20 = 5,171.90 : x
2. Step 2: Convert to fraction form
   12,196.41/18,294.20 = 5,171.90/x
3. Step 3: Cross multiply
   12,196.41x = 18,294.20 × 5,171.90
4. Step 4: Simplify right side
   12,196.41x = 94,615,655.65
5. Step 5: Solve for x
   x = 94,615,655.65/12,196.41
6. Step 6: Final answer
   x = 7,757.66