Finding the Fourth Proportional to 2,990.83, 4,485.72 and 910.33

Step by Step Solution

1. Step 1: Write the proportion equation
   2,990.83 : 4,485.72 = 910.33 : x
2. Step 2: Convert to fraction form
   2,990.83/4,485.72 = 910.33/x
3. Step 3: Cross multiply
   2,990.83x = 4,485.72 × 910.33
4. Step 4: Simplify right side
   2,990.83x = 4,083,480.94
5. Step 5: Solve for x
   x = 4,083,480.94/2,990.83
6. Step 6: Final answer
   x = 1,365.33