Finding the Fourth Proportional to 1,028.98, 1,419.83 and 656.28

Step by Step Solution

1. Step 1: Write the proportion equation
   1,028.98 : 1,419.83 = 656.28 : x
2. Step 2: Convert to fraction form
   1,028.98/1,419.83 = 656.28/x
3. Step 3: Cross multiply
   1,028.98x = 1,419.83 × 656.28
4. Step 4: Simplify right side
   1,028.98x = 931,802.75
5. Step 5: Solve for x
   x = 931,802.75/1,028.98
6. Step 6: Final answer
   x = 905.56