Finding the Fourth Proportional to 2,639.82, 3,959.64 and 1,253.82

Step by Step Solution

1. Step 1: Write the proportion equation
   2,639.82 : 3,959.64 = 1,253.82 : x
2. Step 2: Convert to fraction form
   2,639.82/3,959.64 = 1,253.82/x
3. Step 3: Cross multiply
   2,639.82x = 3,959.64 × 1,253.82
4. Step 4: Simplify right side
   2,639.82x = 4,964,675.82
5. Step 5: Solve for x
   x = 4,964,675.82/2,639.82
6. Step 6: Final answer
   x = 1,880.69