Finding the Fourth Proportional to 2,667.71, 4,001.42 and 818.82

Step by Step Solution

1. Step 1: Write the proportion equation
   2,667.71 : 4,001.42 = 818.82 : x
2. Step 2: Convert to fraction form
   2,667.71/4,001.42 = 818.82/x
3. Step 3: Cross multiply
   2,667.71x = 4,001.42 × 818.82
4. Step 4: Simplify right side
   2,667.71x = 3,276,442.72
5. Step 5: Solve for x
   x = 3,276,442.72/2,667.71
6. Step 6: Final answer
   x = 1,228.19