Finding the Fourth Proportional to 72.46, 108.69 and 42.22

Step by Step Solution

1. Step 1: Write the proportion equation
   72.46 : 108.69 = 42.22 : x
2. Step 2: Convert to fraction form
   72.46/108.69 = 42.22/x
3. Step 3: Cross multiply
   72.46x = 108.69 × 42.22
4. Step 4: Simplify right side
   72.46x = 4,588.89
5. Step 5: Solve for x
   x = 4,588.89/72.46
6. Step 6: Final answer
   x = 63.33