Finding the Fourth Proportional to 2,550.51, 3,825.50 and 819

Step by Step Solution

1. Step 1: Write the proportion equation
   2,550.51 : 3,825.50 = 819 : x
2. Step 2: Convert to fraction form
   2,550.51/3,825.50 = 819/x
3. Step 3: Cross multiply
   2,550.51x = 3,825.50 × 819
4. Step 4: Simplify right side
   2,550.51x = 3,133,080.41
5. Step 5: Solve for x
   x = 3,133,080.41/2,550.51
6. Step 6: Final answer
   x = 1,228.41