Finding the Fourth Proportional to 2,019.26, 2,786.81 and 1,179.90

Step by Step Solution

1. Step 1: Write the proportion equation
   2,019.26 : 2,786.81 = 1,179.90 : x
2. Step 2: Convert to fraction form
   2,019.26/2,786.81 = 1,179.90/x
3. Step 3: Cross multiply
   2,019.26x = 2,786.81 × 1,179.90
4. Step 4: Simplify right side
   2,019.26x = 3,288,151.22
5. Step 5: Solve for x
   x = 3,288,151.22/2,019.26
6. Step 6: Final answer
   x = 1,628.39