Finding the Fourth Proportional to 1,028.83, 1,420.25 and 656.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,028.83 : 1,420.25 = 656.31 : x
2. Step 2: Convert to fraction form
   1,028.83/1,420.25 = 656.31/x
3. Step 3: Cross multiply
   1,028.83x = 1,420.25 × 656.31
4. Step 4: Simplify right side
   1,028.83x = 932,121.00
5. Step 5: Solve for x
   x = 932,121.00/1,028.83
6. Step 6: Final answer
   x = 906.00