Finding the Fourth Proportional to 1,028.16, 1,417.35 and 818.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,028.16 : 1,417.35 = 818.42 : x
2. Step 2: Convert to fraction form
   1,028.16/1,417.35 = 818.42/x
3. Step 3: Cross multiply
   1,028.16x = 1,417.35 × 818.42
4. Step 4: Simplify right side
   1,028.16x = 1,159,987.59
5. Step 5: Solve for x
   x = 1,159,987.59/1,028.16
6. Step 6: Final answer
   x = 1,128.22