Finding the Fourth Proportional to 1,028.08, 1,418.72 and 586.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,028.08 : 1,418.72 = 586.12 : x
2. Step 2: Convert to fraction form
   1,028.08/1,418.72 = 586.12/x
3. Step 3: Cross multiply
   1,028.08x = 1,418.72 × 586.12
4. Step 4: Simplify right side
   1,028.08x = 831,540.17
5. Step 5: Solve for x
   x = 831,540.17/1,028.08
6. Step 6: Final answer
   x = 808.83