Finding the Fourth Proportional to 12,449.89, 18,678.47 and 4,016.21

Step by Step Solution

1. Step 1: Write the proportion equation
   12,449.89 : 18,678.47 = 4,016.21 : x
2. Step 2: Convert to fraction form
   12,449.89/18,678.47 = 4,016.21/x
3. Step 3: Cross multiply
   12,449.89x = 18,678.47 × 4,016.21
4. Step 4: Simplify right side
   12,449.89x = 75,016,614.00
5. Step 5: Solve for x
   x = 75,016,614.00/12,449.89
6. Step 6: Final answer
   x = 6,025.48