Finding the Fourth Proportional to 8,215.04, 12,319.35 and 2,667.05

Step by Step Solution

1. Step 1: Write the proportion equation
   8,215.04 : 12,319.35 = 2,667.05 : x
2. Step 2: Convert to fraction form
   8,215.04/12,319.35 = 2,667.05/x
3. Step 3: Cross multiply
   8,215.04x = 12,319.35 × 2,667.05
4. Step 4: Simplify right side
   8,215.04x = 32,856,260.82
5. Step 5: Solve for x
   x = 32,856,260.82/8,215.04
6. Step 6: Final answer
   x = 3,999.53