Finding the Fourth Proportional to 1,438.25, 1,984.83 and 817.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,438.25 : 1,984.83 = 817.25 : x
2. Step 2: Convert to fraction form
   1,438.25/1,984.83 = 817.25/x
3. Step 3: Cross multiply
   1,438.25x = 1,984.83 × 817.25
4. Step 4: Simplify right side
   1,438.25x = 1,622,102.32
5. Step 5: Solve for x
   x = 1,622,102.32/1,438.25
6. Step 6: Final answer
   x = 1,127.83