Finding the Fourth Proportional to 12,185.89, 18,274.23 and 4,786.31

Step by Step Solution

1. Step 1: Write the proportion equation
   12,185.89 : 18,274.23 = 4,786.31 : x
2. Step 2: Convert to fraction form
   12,185.89/18,274.23 = 4,786.31/x
3. Step 3: Cross multiply
   12,185.89x = 18,274.23 × 4,786.31
4. Step 4: Simplify right side
   12,185.89x = 87,466,175.48
5. Step 5: Solve for x
   x = 87,466,175.48/12,185.89
6. Step 6: Final answer
   x = 7,177.66