Finding the Fourth Proportional to 1,208.45, 1,667.49 and 684.38

Step by Step Solution

1. Step 1: Write the proportion equation
   1,208.45 : 1,667.49 = 684.38 : x
2. Step 2: Convert to fraction form
   1,208.45/1,667.49 = 684.38/x
3. Step 3: Cross multiply
   1,208.45x = 1,667.49 × 684.38
4. Step 4: Simplify right side
   1,208.45x = 1,141,196.81
5. Step 5: Solve for x
   x = 1,141,196.81/1,208.45
6. Step 6: Final answer
   x = 944.35