Finding the Fourth Proportional to 1,640.56, 2,442.54 and 1,617.58

Step by Step Solution

1. Step 1: Write the proportion equation
   1,640.56 : 2,442.54 = 1,617.58 : x
2. Step 2: Convert to fraction form
   1,640.56/2,442.54 = 1,617.58/x
3. Step 3: Cross multiply
   1,640.56x = 2,442.54 × 1,617.58
4. Step 4: Simplify right side
   1,640.56x = 3,951,003.85
5. Step 5: Solve for x
   x = 3,951,003.85/1,640.56
6. Step 6: Final answer
   x = 2,408.33