Finding the Fourth Proportional to 16,667.22, 24,978.63 and 8,220.81

Step by Step Solution

1. Step 1: Write the proportion equation
   16,667.22 : 24,978.63 = 8,220.81 : x
2. Step 2: Convert to fraction form
   16,667.22/24,978.63 = 8,220.81/x
3. Step 3: Cross multiply
   16,667.22x = 24,978.63 × 8,220.81
4. Step 4: Simplify right side
   16,667.22x = 205,344,571.29
5. Step 5: Solve for x
   x = 205,344,571.29/16,667.22
6. Step 6: Final answer
   x = 12,320.27