Finding the Fourth Proportional to 3,185.82, 4,778.55 and 993.96

Step by Step Solution

1. Step 1: Write the proportion equation
   3,185.82 : 4,778.55 = 993.96 : x
2. Step 2: Convert to fraction form
   3,185.82/4,778.55 = 993.96/x
3. Step 3: Cross multiply
   3,185.82x = 4,778.55 × 993.96
4. Step 4: Simplify right side
   3,185.82x = 4,749,687.56
5. Step 5: Solve for x
   x = 4,749,687.56/3,185.82
6. Step 6: Final answer
   x = 1,490.88