Finding the Fourth Proportional to 8,667.68, 12,998.72 and 2,822.72

Step by Step Solution

1. Step 1: Write the proportion equation
   8,667.68 : 12,998.72 = 2,822.72 : x
2. Step 2: Convert to fraction form
   8,667.68/12,998.72 = 2,822.72/x
3. Step 3: Cross multiply
   8,667.68x = 12,998.72 × 2,822.72
4. Step 4: Simplify right side
   8,667.68x = 36,691,746.92
5. Step 5: Solve for x
   x = 36,691,746.92/8,667.68
6. Step 6: Final answer
   x = 4,233.17