Finding the Fourth Proportional to 8,311.30, 12,456.56 and 4,152.47

Step by Step Solution

1. Step 1: Write the proportion equation
   8,311.30 : 12,456.56 = 4,152.47 : x
2. Step 2: Convert to fraction form
   8,311.30/12,456.56 = 4,152.47/x
3. Step 3: Cross multiply
   8,311.30x = 12,456.56 × 4,152.47
4. Step 4: Simplify right side
   8,311.30x = 51,725,502.08
5. Step 5: Solve for x
   x = 51,725,502.08/8,311.30
6. Step 6: Final answer
   x = 6,223.52