Finding the Fourth Proportional to 2,667.88, 4,001.88 and 818.96

Step by Step Solution

1. Step 1: Write the proportion equation
   2,667.88 : 4,001.88 = 818.96 : x
2. Step 2: Convert to fraction form
   2,667.88/4,001.88 = 818.96/x
3. Step 3: Cross multiply
   2,667.88x = 4,001.88 × 818.96
4. Step 4: Simplify right side
   2,667.88x = 3,277,379.64
5. Step 5: Solve for x
   x = 3,277,379.64/2,667.88
6. Step 6: Final answer
   x = 1,228.46