Finding the Fourth Proportional to 3,665.10, 5,496.30 and 1,815.60

Step by Step Solution

1. Step 1: Write the proportion equation
   3,665.10 : 5,496.30 = 1,815.60 : x
2. Step 2: Convert to fraction form
   3,665.10/5,496.30 = 1,815.60/x
3. Step 3: Cross multiply
   3,665.10x = 5,496.30 × 1,815.60
4. Step 4: Simplify right side
   3,665.10x = 9,979,082.28
5. Step 5: Solve for x
   x = 9,979,082.28/3,665.10
6. Step 6: Final answer
   x = 2,722.73