Finding the Fourth Proportional to 8,185.47, 12,283.59 and 4,490.30

Step by Step Solution

1. Step 1: Write the proportion equation
   8,185.47 : 12,283.59 = 4,490.30 : x
2. Step 2: Convert to fraction form
   8,185.47/12,283.59 = 4,490.30/x
3. Step 3: Cross multiply
   8,185.47x = 12,283.59 × 4,490.30
4. Step 4: Simplify right side
   8,185.47x = 55,156,920.31
5. Step 5: Solve for x
   x = 55,156,920.31/8,185.47
6. Step 6: Final answer
   x = 6,738.39