Finding the Fourth Proportional to 42.72, 63.69 and 42.32

Step by Step Solution

1. Step 1: Write the proportion equation
   42.72 : 63.69 = 42.32 : x
2. Step 2: Convert to fraction form
   42.72/63.69 = 42.32/x
3. Step 3: Cross multiply
   42.72x = 63.69 × 42.32
4. Step 4: Simplify right side
   42.72x = 2,695.36
5. Step 5: Solve for x
   x = 2,695.36/42.72
6. Step 6: Final answer
   x = 63.09