Finding the Fourth Proportional to 28.22, 42.41 and 13.98

Step by Step Solution

1. Step 1: Write the proportion equation
   28.22 : 42.41 = 13.98 : x
2. Step 2: Convert to fraction form
   28.22/42.41 = 13.98/x
3. Step 3: Cross multiply
   28.22x = 42.41 × 13.98
4. Step 4: Simplify right side
   28.22x = 592.89
5. Step 5: Solve for x
   x = 592.89/28.22
6. Step 6: Final answer
   x = 21.01