Finding the Fourth Proportional to 3,638.35, 5,019.46 and 2,145.75

Step by Step Solution

1. Step 1: Write the proportion equation
   3,638.35 : 5,019.46 = 2,145.75 : x
2. Step 2: Convert to fraction form
   3,638.35/5,019.46 = 2,145.75/x
3. Step 3: Cross multiply
   3,638.35x = 5,019.46 × 2,145.75
4. Step 4: Simplify right side
   3,638.35x = 10,770,506.30
5. Step 5: Solve for x
   x = 10,770,506.30/3,638.35
6. Step 6: Final answer
   x = 2,960.27