Finding the Fourth Proportional to 1,004.18, 1,384.38 and 817.38

Step by Step Solution

1. Step 1: Write the proportion equation
   1,004.18 : 1,384.38 = 817.38 : x
2. Step 2: Convert to fraction form
   1,004.18/1,384.38 = 817.38/x
3. Step 3: Cross multiply
   1,004.18x = 1,384.38 × 817.38
4. Step 4: Simplify right side
   1,004.18x = 1,131,564.52
5. Step 5: Solve for x
   x = 1,131,564.52/1,004.18
6. Step 6: Final answer
   x = 1,126.86