Finding the Fourth Proportional to 3,608.10, 4,979.68 and 2,116.50

Step by Step Solution

1. Step 1: Write the proportion equation
   3,608.10 : 4,979.68 = 2,116.50 : x
2. Step 2: Convert to fraction form
   3,608.10/4,979.68 = 2,116.50/x
3. Step 3: Cross multiply
   3,608.10x = 4,979.68 × 2,116.50
4. Step 4: Simplify right side
   3,608.10x = 10,539,492.72
5. Step 5: Solve for x
   x = 10,539,492.72/3,608.10
6. Step 6: Final answer
   x = 2,921.06