Finding the Fourth Proportional to 21,914.22, 30,242.79 and 12,485.82

Step by Step Solution

1. Step 1: Write the proportion equation
   21,914.22 : 30,242.79 = 12,485.82 : x
2. Step 2: Convert to fraction form
   21,914.22/30,242.79 = 12,485.82/x
3. Step 3: Cross multiply
   21,914.22x = 30,242.79 × 12,485.82
4. Step 4: Simplify right side
   21,914.22x = 377,606,032.24
5. Step 5: Solve for x
   x = 377,606,032.24/21,914.22
6. Step 6: Final answer
   x = 17,231.10