Finding the Fourth Proportional to 1,208.80, 1,667.95 and 684.73

Step by Step Solution

1. Step 1: Write the proportion equation
   1,208.80 : 1,667.95 = 684.73 : x
2. Step 2: Convert to fraction form
   1,208.80/1,667.95 = 684.73/x
3. Step 3: Cross multiply
   1,208.80x = 1,667.95 × 684.73
4. Step 4: Simplify right side
   1,208.80x = 1,142,095.40
5. Step 5: Solve for x
   x = 1,142,095.40/1,208.80
6. Step 6: Final answer
   x = 944.82