Finding the Fourth Proportional to 2,638.55, 3,954.18 and 2,559.71

Step by Step Solution

1. Step 1: Write the proportion equation
   2,638.55 : 3,954.18 = 2,559.71 : x
2. Step 2: Convert to fraction form
   2,638.55/3,954.18 = 2,559.71/x
3. Step 3: Cross multiply
   2,638.55x = 3,954.18 × 2,559.71
4. Step 4: Simplify right side
   2,638.55x = 10,121,554.09
5. Step 5: Solve for x
   x = 10,121,554.09/2,638.55
6. Step 6: Final answer
   x = 3,836.03