Finding the Fourth Proportional to 3,069.20, 4,231.78 and 2,388.03

Step by Step Solution

1. Step 1: Write the proportion equation
   3,069.20 : 4,231.78 = 2,388.03 : x
2. Step 2: Convert to fraction form
   3,069.20/4,231.78 = 2,388.03/x
3. Step 3: Cross multiply
   3,069.20x = 4,231.78 × 2,388.03
4. Step 4: Simplify right side
   3,069.20x = 10,105,636.45
5. Step 5: Solve for x
   x = 10,105,636.45/3,069.20
6. Step 6: Final answer
   x = 3,292.59