Finding the Fourth Proportional to 2,667.98, 4,002.18 and 720.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,667.98 : 4,002.18 = 720.20 : x
2. Step 2: Convert to fraction form
   2,667.98/4,002.18 = 720.20/x
3. Step 3: Cross multiply
   2,667.98x = 4,002.18 × 720.20
4. Step 4: Simplify right side
   2,667.98x = 2,882,370.04
5. Step 5: Solve for x
   x = 2,882,370.04/2,667.98
6. Step 6: Final answer
   x = 1,080.36