Finding the Fourth Proportional to 2,667.56, 4,002.04 and 818.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,667.56 : 4,002.04 = 818.72 : x
2. Step 2: Convert to fraction form
   2,667.56/4,002.04 = 818.72/x
3. Step 3: Cross multiply
   2,667.56x = 4,002.04 × 818.72
4. Step 4: Simplify right side
   2,667.56x = 3,276,550.19
5. Step 5: Solve for x
   x = 3,276,550.19/2,667.56
6. Step 6: Final answer
   x = 1,228.29