Finding the Fourth Proportional to 2,853.38, 3,939.53 and 2,554.11

Step by Step Solution

1. Step 1: Write the proportion equation
   2,853.38 : 3,939.53 = 2,554.11 : x
2. Step 2: Convert to fraction form
   2,853.38/3,939.53 = 2,554.11/x
3. Step 3: Cross multiply
   2,853.38x = 3,939.53 × 2,554.11
4. Step 4: Simplify right side
   2,853.38x = 10,061,980.20
5. Step 5: Solve for x
   x = 10,061,980.20/2,853.38
6. Step 6: Final answer
   x = 3,526.33