Finding the Fourth Proportional to 3,189.27, 4,402.55 and 2,479.41

Step by Step Solution

1. Step 1: Write the proportion equation
   3,189.27 : 4,402.55 = 2,479.41 : x
2. Step 2: Convert to fraction form
   3,189.27/4,402.55 = 2,479.41/x
3. Step 3: Cross multiply
   3,189.27x = 4,402.55 × 2,479.41
4. Step 4: Simplify right side
   3,189.27x = 10,915,732.69
5. Step 5: Solve for x
   x = 10,915,732.69/3,189.27
6. Step 6: Final answer
   x = 3,422.64