Finding the Fourth Proportional to 3,185.94, 4,778.21 and 993.47

Step by Step Solution

1. Step 1: Write the proportion equation
   3,185.94 : 4,778.21 = 993.47 : x
2. Step 2: Convert to fraction form
   3,185.94/4,778.21 = 993.47/x
3. Step 3: Cross multiply
   3,185.94x = 4,778.21 × 993.47
4. Step 4: Simplify right side
   3,185.94x = 4,747,022.72
5. Step 5: Solve for x
   x = 4,747,022.72/3,185.94
6. Step 6: Final answer
   x = 1,489.99