Finding the Fourth Proportional to 1,208.16, 1,667.16 and 684.24

Step by Step Solution

1. Step 1: Write the proportion equation
   1,208.16 : 1,667.16 = 684.24 : x
2. Step 2: Convert to fraction form
   1,208.16/1,667.16 = 684.24/x
3. Step 3: Cross multiply
   1,208.16x = 1,667.16 × 684.24
4. Step 4: Simplify right side
   1,208.16x = 1,140,737.56
5. Step 5: Solve for x
   x = 1,140,737.56/1,208.16
6. Step 6: Final answer
   x = 944.19