Finding the Fourth Proportional to 21,773.21, 30,048.22 and 12,216.12

Step by Step Solution

1. Step 1: Write the proportion equation
   21,773.21 : 30,048.22 = 12,216.12 : x
2. Step 2: Convert to fraction form
   21,773.21/30,048.22 = 12,216.12/x
3. Step 3: Cross multiply
   21,773.21x = 30,048.22 × 12,216.12
4. Step 4: Simplify right side
   21,773.21x = 367,072,661.31
5. Step 5: Solve for x
   x = 367,072,661.31/21,773.21
6. Step 6: Final answer
   x = 16,858.91