Finding the Fourth Proportional to 1,208.09, 1,667.31 and 684.02

Step by Step Solution

1. Step 1: Write the proportion equation
   1,208.09 : 1,667.31 = 684.02 : x
2. Step 2: Convert to fraction form
   1,208.09/1,667.31 = 684.02/x
3. Step 3: Cross multiply
   1,208.09x = 1,667.31 × 684.02
4. Step 4: Simplify right side
   1,208.09x = 1,140,473.39
5. Step 5: Solve for x
   x = 1,140,473.39/1,208.09
6. Step 6: Final answer
   x = 944.03