Finding the Fourth Proportional to 12,271.92, 18,410.31 and 4,479.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,271.92 : 18,410.31 = 4,479.72 : x
2. Step 2: Convert to fraction form
   12,271.92/18,410.31 = 4,479.72/x
3. Step 3: Cross multiply
   12,271.92x = 18,410.31 × 4,479.72
4. Step 4: Simplify right side
   12,271.92x = 82,473,033.91
5. Step 5: Solve for x
   x = 82,473,033.91/12,271.92
6. Step 6: Final answer
   x = 6,720.47