Finding the Fourth Proportional to 8,311.86, 12,467.69 and 2,388.89

Step by Step Solution

1. Step 1: Write the proportion equation
   8,311.86 : 12,467.69 = 2,388.89 : x
2. Step 2: Convert to fraction form
   8,311.86/12,467.69 = 2,388.89/x
3. Step 3: Cross multiply
   8,311.86x = 12,467.69 × 2,388.89
4. Step 4: Simplify right side
   8,311.86x = 29,783,939.96
5. Step 5: Solve for x
   x = 29,783,939.96/8,311.86
6. Step 6: Final answer
   x = 3,583.31