Finding the Fourth Proportional to 2,485.35, 3,429.96 and 1,644.59

Step by Step Solution

1. Step 1: Write the proportion equation
   2,485.35 : 3,429.96 = 1,644.59 : x
2. Step 2: Convert to fraction form
   2,485.35/3,429.96 = 1,644.59/x
3. Step 3: Cross multiply
   2,485.35x = 3,429.96 × 1,644.59
4. Step 4: Simplify right side
   2,485.35x = 5,640,860.77
5. Step 5: Solve for x
   x = 5,640,860.77/2,485.35
6. Step 6: Final answer
   x = 2,269.64