Finding the Fourth Proportional to 1,208.25, 1,667.59 and 684.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,208.25 : 1,667.59 = 684.59 : x
2. Step 2: Convert to fraction form
   1,208.25/1,667.59 = 684.59/x
3. Step 3: Cross multiply
   1,208.25x = 1,667.59 × 684.59
4. Step 4: Simplify right side
   1,208.25x = 1,141,605.39
5. Step 5: Solve for x
   x = 1,141,605.39/1,208.25
6. Step 6: Final answer
   x = 944.84