Finding the Fourth Proportional to 12,185.68, 18,279.24 and 3,865.54

Step by Step Solution

1. Step 1: Write the proportion equation
   12,185.68 : 18,279.24 = 3,865.54 : x
2. Step 2: Convert to fraction form
   12,185.68/18,279.24 = 3,865.54/x
3. Step 3: Cross multiply
   12,185.68x = 18,279.24 × 3,865.54
4. Step 4: Simplify right side
   12,185.68x = 70,659,133.39
5. Step 5: Solve for x
   x = 70,659,133.39/12,185.68
6. Step 6: Final answer
   x = 5,798.54