Finding the Fourth Proportional to 2,722.38, 4,079.97 and 989.34

Step by Step Solution

1. Step 1: Write the proportion equation
   2,722.38 : 4,079.97 = 989.34 : x
2. Step 2: Convert to fraction form
   2,722.38/4,079.97 = 989.34/x
3. Step 3: Cross multiply
   2,722.38x = 4,079.97 × 989.34
4. Step 4: Simplify right side
   2,722.38x = 4,036,477.52
5. Step 5: Solve for x
   x = 4,036,477.52/2,722.38
6. Step 6: Final answer
   x = 1,482.70