Finding the Fourth Proportional to 2,548.98, 3,823.30 and 905.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,548.98 : 3,823.30 = 905.31 : x
2. Step 2: Convert to fraction form
   2,548.98/3,823.30 = 905.31/x
3. Step 3: Cross multiply
   2,548.98x = 3,823.30 × 905.31
4. Step 4: Simplify right side
   2,548.98x = 3,461,271.72
5. Step 5: Solve for x
   x = 3,461,271.72/2,548.98
6. Step 6: Final answer
   x = 1,357.90