Finding the Fourth Proportional to 2,811.07, 3,910.27 and 2,757.61

Step by Step Solution

1. Step 1: Write the proportion equation
   2,811.07 : 3,910.27 = 2,757.61 : x
2. Step 2: Convert to fraction form
   2,811.07/3,910.27 = 2,757.61/x
3. Step 3: Cross multiply
   2,811.07x = 3,910.27 × 2,757.61
4. Step 4: Simplify right side
   2,811.07x = 10,782,999.65
5. Step 5: Solve for x
   x = 10,782,999.65/2,811.07
6. Step 6: Final answer
   x = 3,835.91