Finding the Fourth Proportional to 1,855.10, 2,546.42 and 1,640.58

Step by Step Solution

1. Step 1: Write the proportion equation
   1,855.10 : 2,546.42 = 1,640.58 : x
2. Step 2: Convert to fraction form
   1,855.10/2,546.42 = 1,640.58/x
3. Step 3: Cross multiply
   1,855.10x = 2,546.42 × 1,640.58
4. Step 4: Simplify right side
   1,855.10x = 4,177,605.72
5. Step 5: Solve for x
   x = 4,177,605.72/1,855.10
6. Step 6: Final answer
   x = 2,251.96