Finding the Fourth Proportional to 42.73, 64.09 and 42.32

Step by Step Solution

1. Step 1: Write the proportion equation
   42.73 : 64.09 = 42.32 : x
2. Step 2: Convert to fraction form
   42.73/64.09 = 42.32/x
3. Step 3: Cross multiply
   42.73x = 64.09 × 42.32
4. Step 4: Simplify right side
   42.73x = 2,712.50
5. Step 5: Solve for x
   x = 2,712.50/42.73
6. Step 6: Final answer
   x = 63.48