Finding the Fourth Proportional to 4,105.82, 6,159.40 and 1,640.72

Step by Step Solution

1. Step 1: Write the proportion equation
   4,105.82 : 6,159.40 = 1,640.72 : x
2. Step 2: Convert to fraction form
   4,105.82/6,159.40 = 1,640.72/x
3. Step 3: Cross multiply
   4,105.82x = 6,159.40 × 1,640.72
4. Step 4: Simplify right side
   4,105.82x = 10,105,850.77
5. Step 5: Solve for x
   x = 10,105,850.77/4,105.82
6. Step 6: Final answer
   x = 2,461.35