Finding the Fourth Proportional to 72.82, 109.10 and 42.32

Step by Step Solution

1. Step 1: Write the proportion equation
   72.82 : 109.10 = 42.32 : x
2. Step 2: Convert to fraction form
   72.82/109.10 = 42.32/x
3. Step 3: Cross multiply
   72.82x = 109.10 × 42.32
4. Step 4: Simplify right side
   72.82x = 4,617.49
5. Step 5: Solve for x
   x = 4,617.49/72.82
6. Step 6: Final answer
   x = 63.41