Finding the Fourth Proportional to 2,868.84, 3,954.69 and 1,986.48

Step by Step Solution

1. Step 1: Write the proportion equation
   2,868.84 : 3,954.69 = 1,986.48 : x
2. Step 2: Convert to fraction form
   2,868.84/3,954.69 = 1,986.48/x
3. Step 3: Cross multiply
   2,868.84x = 3,954.69 × 1,986.48
4. Step 4: Simplify right side
   2,868.84x = 7,855,912.59
5. Step 5: Solve for x
   x = 7,855,912.59/2,868.84
6. Step 6: Final answer
   x = 2,738.36