Finding the Fourth Proportional to 2,644.76, 3,648.32 and 1,685.89

Step by Step Solution

1. Step 1: Write the proportion equation
   2,644.76 : 3,648.32 = 1,685.89 : x
2. Step 2: Convert to fraction form
   2,644.76/3,648.32 = 1,685.89/x
3. Step 3: Cross multiply
   2,644.76x = 3,648.32 × 1,685.89
4. Step 4: Simplify right side
   2,644.76x = 6,150,658.40
5. Step 5: Solve for x
   x = 6,150,658.40/2,644.76
6. Step 6: Final answer
   x = 2,325.60