Finding the Fourth Proportional to 12,176.89, 18,258.39 and 3,859

Step by Step Solution

1. Step 1: Write the proportion equation
   12,176.89 : 18,258.39 = 3,859 : x
2. Step 2: Convert to fraction form
   12,176.89/18,258.39 = 3,859/x
3. Step 3: Cross multiply
   12,176.89x = 18,258.39 × 3,859
4. Step 4: Simplify right side
   12,176.89x = 70,459,127.01
5. Step 5: Solve for x
   x = 70,459,127.01/12,176.89
6. Step 6: Final answer
   x = 5,786.30