Finding the Fourth Proportional to 8,213.91, 12,321.02 and 2,667.25

Step by Step Solution

1. Step 1: Write the proportion equation
   8,213.91 : 12,321.02 = 2,667.25 : x
2. Step 2: Convert to fraction form
   8,213.91/12,321.02 = 2,667.25/x
3. Step 3: Cross multiply
   8,213.91x = 12,321.02 × 2,667.25
4. Step 4: Simplify right side
   8,213.91x = 32,863,240.60
5. Step 5: Solve for x
   x = 32,863,240.60/8,213.91
6. Step 6: Final answer
   x = 4,000.93