Finding the Fourth Proportional to 2,548.38, 3,822.81 and 905.10

Step by Step Solution

1. Step 1: Write the proportion equation
   2,548.38 : 3,822.81 = 905.10 : x
2. Step 2: Convert to fraction form
   2,548.38/3,822.81 = 905.10/x
3. Step 3: Cross multiply
   2,548.38x = 3,822.81 × 905.10
4. Step 4: Simplify right side
   2,548.38x = 3,460,025.33
5. Step 5: Solve for x
   x = 3,460,025.33/2,548.38
6. Step 6: Final answer
   x = 1,357.74