Finding the Fourth Proportional to 42.18, 63.29 and 15.14

Step by Step Solution

1. Step 1: Write the proportion equation
   42.18 : 63.29 = 15.14 : x
2. Step 2: Convert to fraction form
   42.18/63.29 = 15.14/x
3. Step 3: Cross multiply
   42.18x = 63.29 × 15.14
4. Step 4: Simplify right side
   42.18x = 957.82
5. Step 5: Solve for x
   x = 957.82/42.18
6. Step 6: Final answer
   x = 22.71