Finding the Fourth Proportional to 2,990.35, 4,485.17 and 799.25

Step by Step Solution

1. Step 1: Write the proportion equation
   2,990.35 : 4,485.17 = 799.25 : x
2. Step 2: Convert to fraction form
   2,990.35/4,485.17 = 799.25/x
3. Step 3: Cross multiply
   2,990.35x = 4,485.17 × 799.25
4. Step 4: Simplify right side
   2,990.35x = 3,584,760.10
5. Step 5: Solve for x
   x = 3,584,760.10/2,990.35
6. Step 6: Final answer
   x = 1,198.78