Finding the Fourth Proportional to 2,633.48, 3,949.98 and 989.96

Step by Step Solution

1. Step 1: Write the proportion equation
   2,633.48 : 3,949.98 = 989.96 : x
2. Step 2: Convert to fraction form
   2,633.48/3,949.98 = 989.96/x
3. Step 3: Cross multiply
   2,633.48x = 3,949.98 × 989.96
4. Step 4: Simplify right side
   2,633.48x = 3,910,322.20
5. Step 5: Solve for x
   x = 3,910,322.20/2,633.48
6. Step 6: Final answer
   x = 1,484.85