Finding the Fourth Proportional to 2,079.98, 3,121.25 and 969.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,079.98 : 3,121.25 = 969.20 : x
2. Step 2: Convert to fraction form
   2,079.98/3,121.25 = 969.20/x
3. Step 3: Cross multiply
   2,079.98x = 3,121.25 × 969.20
4. Step 4: Simplify right side
   2,079.98x = 3,025,095.05
5. Step 5: Solve for x
   x = 3,025,095.05/2,079.98
6. Step 6: Final answer
   x = 1,454.39