Finding the Fourth Proportional to 72.48, 108.66 and 42.06

Step by Step Solution

1. Step 1: Write the proportion equation
   72.48 : 108.66 = 42.06 : x
2. Step 2: Convert to fraction form
   72.48/108.66 = 42.06/x
3. Step 3: Cross multiply
   72.48x = 108.66 × 42.06
4. Step 4: Simplify right side
   72.48x = 4,570.24
5. Step 5: Solve for x
   x = 4,570.24/72.48
6. Step 6: Final answer
   x = 63.06