Finding the Fourth Proportional to 2,287.14, 3,428.55 and 989.52

Step by Step Solution

1. Step 1: Write the proportion equation
   2,287.14 : 3,428.55 = 989.52 : x
2. Step 2: Convert to fraction form
   2,287.14/3,428.55 = 989.52/x
3. Step 3: Cross multiply
   2,287.14x = 3,428.55 × 989.52
4. Step 4: Simplify right side
   2,287.14x = 3,392,618.80
5. Step 5: Solve for x
   x = 3,392,618.80/2,287.14
6. Step 6: Final answer
   x = 1,483.35