Finding the Fourth Proportional to 2,990.39, 4,485.20 and 799.27

Step by Step Solution

1. Step 1: Write the proportion equation
   2,990.39 : 4,485.20 = 799.27 : x
2. Step 2: Convert to fraction form
   2,990.39/4,485.20 = 799.27/x
3. Step 3: Cross multiply
   2,990.39x = 4,485.20 × 799.27
4. Step 4: Simplify right side
   2,990.39x = 3,584,870.59
5. Step 5: Solve for x
   x = 3,584,870.59/2,990.39
6. Step 6: Final answer
   x = 1,198.80