Finding the Fourth Proportional to 2,776.15, 3,831.10 and 1,517.21

Step by Step Solution

1. Step 1: Write the proportion equation
   2,776.15 : 3,831.10 = 1,517.21 : x
2. Step 2: Convert to fraction form
   2,776.15/3,831.10 = 1,517.21/x
3. Step 3: Cross multiply
   2,776.15x = 3,831.10 × 1,517.21
4. Step 4: Simplify right side
   2,776.15x = 5,812,584.98
5. Step 5: Solve for x
   x = 5,812,584.98/2,776.15
6. Step 6: Final answer
   x = 2,093.75