Finding the Fourth Proportional to 2,119, 3,179.72 and 964.80

Step by Step Solution

1. Step 1: Write the proportion equation
   2,119 : 3,179.72 = 964.80 : x
2. Step 2: Convert to fraction form
   2,119/3,179.72 = 964.80/x
3. Step 3: Cross multiply
   2,119x = 3,179.72 × 964.80
4. Step 4: Simplify right side
   2,119x = 3,067,793.86
5. Step 5: Solve for x
   x = 3,067,793.86/2,119
6. Step 6: Final answer
   x = 1,447.76