Finding the Fourth Proportional to 12,218.56, 18,328.24 and 3,899.04

Step by Step Solution

1. Step 1: Write the proportion equation
   12,218.56 : 18,328.24 = 3,899.04 : x
2. Step 2: Convert to fraction form
   12,218.56/18,328.24 = 3,899.04/x
3. Step 3: Cross multiply
   12,218.56x = 18,328.24 × 3,899.04
4. Step 4: Simplify right side
   12,218.56x = 71,462,540.89
5. Step 5: Solve for x
   x = 71,462,540.89/12,218.56
6. Step 6: Final answer
   x = 5,848.69