Finding the Fourth Proportional to 2,774.79, 3,828.20 and 1,831.05

Step by Step Solution

1. Step 1: Write the proportion equation
   2,774.79 : 3,828.20 = 1,831.05 : x
2. Step 2: Convert to fraction form
   2,774.79/3,828.20 = 1,831.05/x
3. Step 3: Cross multiply
   2,774.79x = 3,828.20 × 1,831.05
4. Step 4: Simplify right side
   2,774.79x = 7,009,616.45
5. Step 5: Solve for x
   x = 7,009,616.45/2,774.79
6. Step 6: Final answer
   x = 2,526.18