Finding the Fourth Proportional to 2,667.75, 3,672.78 and 2,318.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,667.75 : 3,672.78 = 2,318.31 : x
2. Step 2: Convert to fraction form
   2,667.75/3,672.78 = 2,318.31/x
3. Step 3: Cross multiply
   2,667.75x = 3,672.78 × 2,318.31
4. Step 4: Simplify right side
   2,667.75x = 8,514,642.60
5. Step 5: Solve for x
   x = 8,514,642.60/2,667.75
6. Step 6: Final answer
   x = 3,191.69