Finding the Fourth Proportional to 21,879.48, 30,141 and 17,401.80

Step by Step Solution

1. Step 1: Write the proportion equation
   21,879.48 : 30,141 = 17,401.80 : x
2. Step 2: Convert to fraction form
   21,879.48/30,141 = 17,401.80/x
3. Step 3: Cross multiply
   21,879.48x = 30,141 × 17,401.80
4. Step 4: Simplify right side
   21,879.48x = 524,507,653.80
5. Step 5: Solve for x
   x = 524,507,653.80/21,879.48
6. Step 6: Final answer
   x = 23,972.58