Finding the Fourth Proportional to 3,456.46, 5,183.63 and 990.62

Step by Step Solution

1. Step 1: Write the proportion equation
   3,456.46 : 5,183.63 = 990.62 : x
2. Step 2: Convert to fraction form
   3,456.46/5,183.63 = 990.62/x
3. Step 3: Cross multiply
   3,456.46x = 5,183.63 × 990.62
4. Step 4: Simplify right side
   3,456.46x = 5,135,002.60
5. Step 5: Solve for x
   x = 5,135,002.60/3,456.46
6. Step 6: Final answer
   x = 1,485.62