Finding the Fourth Proportional to 22,287.68, 30,756.76 and 12,216.68

Step by Step Solution

1. Step 1: Write the proportion equation
   22,287.68 : 30,756.76 = 12,216.68 : x
2. Step 2: Convert to fraction form
   22,287.68/30,756.76 = 12,216.68/x
3. Step 3: Cross multiply
   22,287.68x = 30,756.76 × 12,216.68
4. Step 4: Simplify right side
   22,287.68x = 375,745,494.76
5. Step 5: Solve for x
   x = 375,745,494.76/22,287.68
6. Step 6: Final answer
   x = 16,858.89