Finding the Fourth Proportional to 72.68, 109.10 and 42.24

Step by Step Solution

1. Step 1: Write the proportion equation
   72.68 : 109.10 = 42.24 : x
2. Step 2: Convert to fraction form
   72.68/109.10 = 42.24/x
3. Step 3: Cross multiply
   72.68x = 109.10 × 42.24
4. Step 4: Simplify right side
   72.68x = 4,608.38
5. Step 5: Solve for x
   x = 4,608.38/72.68
6. Step 6: Final answer
   x = 63.41