Finding the Fourth Proportional to 2,573.82, 3,860.79 and 818.82

Step by Step Solution

1. Step 1: Write the proportion equation
   2,573.82 : 3,860.79 = 818.82 : x
2. Step 2: Convert to fraction form
   2,573.82/3,860.79 = 818.82/x
3. Step 3: Cross multiply
   2,573.82x = 3,860.79 × 818.82
4. Step 4: Simplify right side
   2,573.82x = 3,161,292.07
5. Step 5: Solve for x
   x = 3,161,292.07/2,573.82
6. Step 6: Final answer
   x = 1,228.25