Finding the Fourth Proportional to 8,322.01, 12,488.55 and 3,939.91

Step by Step Solution

1. Step 1: Write the proportion equation
   8,322.01 : 12,488.55 = 3,939.91 : x
2. Step 2: Convert to fraction form
   8,322.01/12,488.55 = 3,939.91/x
3. Step 3: Cross multiply
   8,322.01x = 12,488.55 × 3,939.91
4. Step 4: Simplify right side
   8,322.01x = 49,203,717.03
5. Step 5: Solve for x
   x = 49,203,717.03/8,322.01
6. Step 6: Final answer
   x = 5,912.48