Finding the Fourth Proportional to 2,528.28, 3,487.32 and 1,644.57

Step by Step Solution

1. Step 1: Write the proportion equation
   2,528.28 : 3,487.32 = 1,644.57 : x
2. Step 2: Convert to fraction form
   2,528.28/3,487.32 = 1,644.57/x
3. Step 3: Cross multiply
   2,528.28x = 3,487.32 × 1,644.57
4. Step 4: Simplify right side
   2,528.28x = 5,735,141.85
5. Step 5: Solve for x
   x = 5,735,141.85/2,528.28
6. Step 6: Final answer
   x = 2,268.40