Finding the Fourth Proportional to 1,208.24, 1,667.40 and 684.28

Step by Step Solution

1. Step 1: Write the proportion equation
   1,208.24 : 1,667.40 = 684.28 : x
2. Step 2: Convert to fraction form
   1,208.24/1,667.40 = 684.28/x
3. Step 3: Cross multiply
   1,208.24x = 1,667.40 × 684.28
4. Step 4: Simplify right side
   1,208.24x = 1,140,968.47
5. Step 5: Solve for x
   x = 1,140,968.47/1,208.24
6. Step 6: Final answer
   x = 944.32