Finding the Fourth Proportional to 2,616.38, 3,609.37 and 1,621.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,616.38 : 3,609.37 = 1,621.30 : x
2. Step 2: Convert to fraction form
   2,616.38/3,609.37 = 1,621.30/x
3. Step 3: Cross multiply
   2,616.38x = 3,609.37 × 1,621.30
4. Step 4: Simplify right side
   2,616.38x = 5,851,871.58
5. Step 5: Solve for x
   x = 5,851,871.58/2,616.38
6. Step 6: Final answer
   x = 2,236.63