Finding the Fourth Proportional to 2,635.89, 3,635.40 and 1,639.29

Step by Step Solution

1. Step 1: Write the proportion equation
   2,635.89 : 3,635.40 = 1,639.29 : x
2. Step 2: Convert to fraction form
   2,635.89/3,635.40 = 1,639.29/x
3. Step 3: Cross multiply
   2,635.89x = 3,635.40 × 1,639.29
4. Step 4: Simplify right side
   2,635.89x = 5,959,474.87
5. Step 5: Solve for x
   x = 5,959,474.87/2,635.89
6. Step 6: Final answer
   x = 2,260.90