Finding the Fourth Proportional to 2,550.82, 3,825.66 and 990.76

Step by Step Solution

1. Step 1: Write the proportion equation
   2,550.82 : 3,825.66 = 990.76 : x
2. Step 2: Convert to fraction form
   2,550.82/3,825.66 = 990.76/x
3. Step 3: Cross multiply
   2,550.82x = 3,825.66 × 990.76
4. Step 4: Simplify right side
   2,550.82x = 3,790,310.90
5. Step 5: Solve for x
   x = 3,790,310.90/2,550.82
6. Step 6: Final answer
   x = 1,485.92