Finding the Fourth Proportional to 2,548.47, 3,823.25 and 818.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,548.47 : 3,823.25 = 818.31 : x
2. Step 2: Convert to fraction form
   2,548.47/3,823.25 = 818.31/x
3. Step 3: Cross multiply
   2,548.47x = 3,823.25 × 818.31
4. Step 4: Simplify right side
   2,548.47x = 3,128,599.62
5. Step 5: Solve for x
   x = 3,128,599.62/2,548.47
6. Step 6: Final answer
   x = 1,227.64