Finding the Fourth Proportional to 2,632.73, 3,948.90 and 989.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,632.73 : 3,948.90 = 989.15 : x
2. Step 2: Convert to fraction form
   2,632.73/3,948.90 = 989.15/x
3. Step 3: Cross multiply
   2,632.73x = 3,948.90 × 989.15
4. Step 4: Simplify right side
   2,632.73x = 3,906,034.69
5. Step 5: Solve for x
   x = 3,906,034.69/2,632.73
6. Step 6: Final answer
   x = 1,483.65