Finding the Fourth Proportional to 2,019.23, 3,022.26 and 1,128.28

Step by Step Solution

1. Step 1: Write the proportion equation
   2,019.23 : 3,022.26 = 1,128.28 : x
2. Step 2: Convert to fraction form
   2,019.23/3,022.26 = 1,128.28/x
3. Step 3: Cross multiply
   2,019.23x = 3,022.26 × 1,128.28
4. Step 4: Simplify right side
   2,019.23x = 3,409,955.74
5. Step 5: Solve for x
   x = 3,409,955.74/2,019.23
6. Step 6: Final answer
   x = 1,688.74