Finding the Fourth Proportional to 2,638.98, 3,955.07 and 1,250.42

Step by Step Solution

1. Step 1: Write the proportion equation
   2,638.98 : 3,955.07 = 1,250.42 : x
2. Step 2: Convert to fraction form
   2,638.98/3,955.07 = 1,250.42/x
3. Step 3: Cross multiply
   2,638.98x = 3,955.07 × 1,250.42
4. Step 4: Simplify right side
   2,638.98x = 4,945,472.60
5. Step 5: Solve for x
   x = 4,945,472.60/2,638.98
6. Step 6: Final answer
   x = 1,874.01