Finding the Fourth Proportional to 3,608.91, 4,979.96 and 2,116.54

Step by Step Solution

1. Step 1: Write the proportion equation
   3,608.91 : 4,979.96 = 2,116.54 : x
2. Step 2: Convert to fraction form
   3,608.91/4,979.96 = 2,116.54/x
3. Step 3: Cross multiply
   3,608.91x = 4,979.96 × 2,116.54
4. Step 4: Simplify right side
   3,608.91x = 10,540,261.51
5. Step 5: Solve for x
   x = 10,540,261.51/3,608.91
6. Step 6: Final answer
   x = 2,920.62