Finding the Fourth Proportional to 12,216.78, 18,317 and 4,424.58

Step by Step Solution

1. Step 1: Write the proportion equation
   12,216.78 : 18,317 = 4,424.58 : x
2. Step 2: Convert to fraction form
   12,216.78/18,317 = 4,424.58/x
3. Step 3: Cross multiply
   12,216.78x = 18,317 × 4,424.58
4. Step 4: Simplify right side
   12,216.78x = 81,045,031.86
5. Step 5: Solve for x
   x = 81,045,031.86/12,216.78
6. Step 6: Final answer
   x = 6,633.91