Finding the Fourth Proportional to 2,633.86, 3,951.37 and 990.41

Step by Step Solution

1. Step 1: Write the proportion equation
   2,633.86 : 3,951.37 = 990.41 : x
2. Step 2: Convert to fraction form
   2,633.86/3,951.37 = 990.41/x
3. Step 3: Cross multiply
   2,633.86x = 3,951.37 × 990.41
4. Step 4: Simplify right side
   2,633.86x = 3,913,469.88
5. Step 5: Solve for x
   x = 3,913,469.88/2,633.86
6. Step 6: Final answer
   x = 1,485.83