Finding the Fourth Proportional to 2,786.76, 3,834.54 and 2,721.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,786.76 : 3,834.54 = 2,721.12 : x
2. Step 2: Convert to fraction form
   2,786.76/3,834.54 = 2,721.12/x
3. Step 3: Cross multiply
   2,786.76x = 3,834.54 × 2,721.12
4. Step 4: Simplify right side
   2,786.76x = 10,434,243.48
5. Step 5: Solve for x
   x = 10,434,243.48/2,786.76
6. Step 6: Final answer
   x = 3,744.22