Finding the Fourth Proportional to 12,185.01, 18,258.39 and 9,418.47

Step by Step Solution

1. Step 1: Write the proportion equation
   12,185.01 : 18,258.39 = 9,418.47 : x
2. Step 2: Convert to fraction form
   12,185.01/18,258.39 = 9,418.47/x
3. Step 3: Cross multiply
   12,185.01x = 18,258.39 × 9,418.47
4. Step 4: Simplify right side
   12,185.01x = 171,966,098.46
5. Step 5: Solve for x
   x = 171,966,098.46/12,185.01
6. Step 6: Final answer
   x = 14,112.92