Finding the Fourth Proportional to 1,208.48, 1,667.52 and 684.40

Step by Step Solution

1. Step 1: Write the proportion equation
   1,208.48 : 1,667.52 = 684.40 : x
2. Step 2: Convert to fraction form
   1,208.48/1,667.52 = 684.40/x
3. Step 3: Cross multiply
   1,208.48x = 1,667.52 × 684.40
4. Step 4: Simplify right side
   1,208.48x = 1,141,250.69
5. Step 5: Solve for x
   x = 1,141,250.69/1,208.48
6. Step 6: Final answer
   x = 944.37