Finding the Fourth Proportional to 2,353.05, 3,528.77 and 1,661.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,353.05 : 3,528.77 = 1,661.31 : x
2. Step 2: Convert to fraction form
   2,353.05/3,528.77 = 1,661.31/x
3. Step 3: Cross multiply
   2,353.05x = 3,528.77 × 1,661.31
4. Step 4: Simplify right side
   2,353.05x = 5,862,372.58
5. Step 5: Solve for x
   x = 5,862,372.58/2,353.05
6. Step 6: Final answer
   x = 2,491.39