Finding the Fourth Proportional to 2,667.39, 4,001.21 and 818.37

Step by Step Solution

1. Step 1: Write the proportion equation
   2,667.39 : 4,001.21 = 818.37 : x
2. Step 2: Convert to fraction form
   2,667.39/4,001.21 = 818.37/x
3. Step 3: Cross multiply
   2,667.39x = 4,001.21 × 818.37
4. Step 4: Simplify right side
   2,667.39x = 3,274,470.23
5. Step 5: Solve for x
   x = 3,274,470.23/2,667.39
6. Step 6: Final answer
   x = 1,227.59