Finding the Fourth Proportional to 12,131.21, 18,196.70 and 3,366.12

Step by Step Solution

1. Step 1: Write the proportion equation
   12,131.21 : 18,196.70 = 3,366.12 : x
2. Step 2: Convert to fraction form
   12,131.21/18,196.70 = 3,366.12/x
3. Step 3: Cross multiply
   12,131.21x = 18,196.70 × 3,366.12
4. Step 4: Simplify right side
   12,131.21x = 61,252,284.22
5. Step 5: Solve for x
   x = 61,252,284.22/12,131.21
6. Step 6: Final answer
   x = 5,049.15