Finding the Fourth Proportional to 4,142.42, 6,215.94 and 3,219.83

Step by Step Solution

1. Step 1: Write the proportion equation
   4,142.42 : 6,215.94 = 3,219.83 : x
2. Step 2: Convert to fraction form
   4,142.42/6,215.94 = 3,219.83/x
3. Step 3: Cross multiply
   4,142.42x = 6,215.94 × 3,219.83
4. Step 4: Simplify right side
   4,142.42x = 20,014,239.01
5. Step 5: Solve for x
   x = 20,014,239.01/4,142.42
6. Step 6: Final answer
   x = 4,831.54