Finding the Fourth Proportional to 1,983.72, 2,976.04 and 685.19

Step by Step Solution

1. Step 1: Write the proportion equation
   1,983.72 : 2,976.04 = 685.19 : x
2. Step 2: Convert to fraction form
   1,983.72/2,976.04 = 685.19/x
3. Step 3: Cross multiply
   1,983.72x = 2,976.04 × 685.19
4. Step 4: Simplify right side
   1,983.72x = 2,039,152.85
5. Step 5: Solve for x
   x = 2,039,152.85/1,983.72
6. Step 6: Final answer
   x = 1,027.94