Finding the Fourth Proportional to 1,004.25, 1,385.61 and 817.43

Step by Step Solution

1. Step 1: Write the proportion equation
   1,004.25 : 1,385.61 = 817.43 : x
2. Step 2: Convert to fraction form
   1,004.25/1,385.61 = 817.43/x
3. Step 3: Cross multiply
   1,004.25x = 1,385.61 × 817.43
4. Step 4: Simplify right side
   1,004.25x = 1,132,632.25
5. Step 5: Solve for x
   x = 1,132,632.25/1,004.25
6. Step 6: Final answer
   x = 1,127.84