Finding the Fourth Proportional to 8,271.18, 12,399.39 and 4,314.15

Step by Step Solution

1. Step 1: Write the proportion equation
   8,271.18 : 12,399.39 = 4,314.15 : x
2. Step 2: Convert to fraction form
   8,271.18/12,399.39 = 4,314.15/x
3. Step 3: Cross multiply
   8,271.18x = 12,399.39 × 4,314.15
4. Step 4: Simplify right side
   8,271.18x = 53,492,828.37
5. Step 5: Solve for x
   x = 53,492,828.37/8,271.18
6. Step 6: Final answer
   x = 6,467.38