Finding the Fourth Proportional to 12,229.73, 18,339.93 and 5,205.31

Step by Step Solution

1. Step 1: Write the proportion equation
   12,229.73 : 18,339.93 = 5,205.31 : x
2. Step 2: Convert to fraction form
   12,229.73/18,339.93 = 5,205.31/x
3. Step 3: Cross multiply
   12,229.73x = 18,339.93 × 5,205.31
4. Step 4: Simplify right side
   12,229.73x = 95,464,929.33
5. Step 5: Solve for x
   x = 95,464,929.33/12,229.73
6. Step 6: Final answer
   x = 7,805.98