Finding the Fourth Proportional to 21,945.48, 30,223.98 and 18,960.36

Step by Step Solution

1. Step 1: Write the proportion equation
   21,945.48 : 30,223.98 = 18,960.36 : x
2. Step 2: Convert to fraction form
   21,945.48/30,223.98 = 18,960.36/x
3. Step 3: Cross multiply
   21,945.48x = 30,223.98 × 18,960.36
4. Step 4: Simplify right side
   21,945.48x = 573,057,541.43
5. Step 5: Solve for x
   x = 573,057,541.43/21,945.48
6. Step 6: Final answer
   x = 26,112.78