Finding the Fourth Proportional to 2,723.10, 4,082.18 and 990.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,723.10 : 4,082.18 = 990.50 : x
2. Step 2: Convert to fraction form
   2,723.10/4,082.18 = 990.50/x
3. Step 3: Cross multiply
   2,723.10x = 4,082.18 × 990.50
4. Step 4: Simplify right side
   2,723.10x = 4,043,399.29
5. Step 5: Solve for x
   x = 4,043,399.29/2,723.10
6. Step 6: Final answer
   x = 1,484.85