Finding the Fourth Proportional to 12,258.79, 18,384.15 and 3,936.83

Step by Step Solution

1. Step 1: Write the proportion equation
   12,258.79 : 18,384.15 = 3,936.83 : x
2. Step 2: Convert to fraction form
   12,258.79/18,384.15 = 3,936.83/x
3. Step 3: Cross multiply
   12,258.79x = 18,384.15 × 3,936.83
4. Step 4: Simplify right side
   12,258.79x = 72,375,273.24
5. Step 5: Solve for x
   x = 72,375,273.24/12,258.79
6. Step 6: Final answer
   x = 5,903.95