Finding the Fourth Proportional to 1,208.23, 1,667.37 and 684.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,208.23 : 1,667.37 = 684.25 : x
2. Step 2: Convert to fraction form
   1,208.23/1,667.37 = 684.25/x
3. Step 3: Cross multiply
   1,208.23x = 1,667.37 × 684.25
4. Step 4: Simplify right side
   1,208.23x = 1,140,897.92
5. Step 5: Solve for x
   x = 1,140,897.92/1,208.23
6. Step 6: Final answer
   x = 944.27