Finding the Fourth Proportional to 12,180.49, 18,271.89 and 3,415.38

Step by Step Solution

1. Step 1: Write the proportion equation
   12,180.49 : 18,271.89 = 3,415.38 : x
2. Step 2: Convert to fraction form
   12,180.49/18,271.89 = 3,415.38/x
3. Step 3: Cross multiply
   12,180.49x = 18,271.89 × 3,415.38
4. Step 4: Simplify right side
   12,180.49x = 62,405,339.23
5. Step 5: Solve for x
   x = 62,405,339.23/12,180.49
6. Step 6: Final answer
   x = 5,123.39