Finding the Fourth Proportional to 2,635.33, 3,949.95 and 990.83

Step by Step Solution

1. Step 1: Write the proportion equation
   2,635.33 : 3,949.95 = 990.83 : x
2. Step 2: Convert to fraction form
   2,635.33/3,949.95 = 990.83/x
3. Step 3: Cross multiply
   2,635.33x = 3,949.95 × 990.83
4. Step 4: Simplify right side
   2,635.33x = 3,913,727.74
5. Step 5: Solve for x
   x = 3,913,727.74/2,635.33
6. Step 6: Final answer
   x = 1,485.10