Finding the Fourth Proportional to 72.97, 109.31 and 42.44

Step by Step Solution

1. Step 1: Write the proportion equation
   72.97 : 109.31 = 42.44 : x
2. Step 2: Convert to fraction form
   72.97/109.31 = 42.44/x
3. Step 3: Cross multiply
   72.97x = 109.31 × 42.44
4. Step 4: Simplify right side
   72.97x = 4,639.50
5. Step 5: Solve for x
   x = 4,639.50/72.97
6. Step 6: Final answer
   x = 63.58