Finding the Fourth Proportional to 21,892.47, 30,212.78 and 12,464.07

Step by Step Solution

1. Step 1: Write the proportion equation
   21,892.47 : 30,212.78 = 12,464.07 : x
2. Step 2: Convert to fraction form
   21,892.47/30,212.78 = 12,464.07/x
3. Step 3: Cross multiply
   21,892.47x = 30,212.78 × 12,464.07
4. Step 4: Simplify right side
   21,892.47x = 376,574,142.49
5. Step 5: Solve for x
   x = 376,574,142.49/21,892.47
6. Step 6: Final answer
   x = 17,201.08