Finding the Fourth Proportional to 1,426.40, 1,968.59 and 1,028.39

Step by Step Solution

1. Step 1: Write the proportion equation
   1,426.40 : 1,968.59 = 1,028.39 : x
2. Step 2: Convert to fraction form
   1,426.40/1,968.59 = 1,028.39/x
3. Step 3: Cross multiply
   1,426.40x = 1,968.59 × 1,028.39
4. Step 4: Simplify right side
   1,426.40x = 2,024,478.05
5. Step 5: Solve for x
   x = 2,024,478.05/1,426.40
6. Step 6: Final answer
   x = 1,419.29