Finding the Fourth Proportional to 2,632.87, 3,949.71 and 989.53

Step by Step Solution

1. Step 1: Write the proportion equation
   2,632.87 : 3,949.71 = 989.53 : x
2. Step 2: Convert to fraction form
   2,632.87/3,949.71 = 989.53/x
3. Step 3: Cross multiply
   2,632.87x = 3,949.71 × 989.53
4. Step 4: Simplify right side
   2,632.87x = 3,908,370.73
5. Step 5: Solve for x
   x = 3,908,370.73/2,632.87
6. Step 6: Final answer
   x = 1,484.45