Finding the Fourth Proportional to 88.37, 132.58 and 42.72

Step by Step Solution

1. Step 1: Write the proportion equation
   88.37 : 132.58 = 42.72 : x
2. Step 2: Convert to fraction form
   88.37/132.58 = 42.72/x
3. Step 3: Cross multiply
   88.37x = 132.58 × 42.72
4. Step 4: Simplify right side
   88.37x = 5,663.82
5. Step 5: Solve for x
   x = 5,663.82/88.37
6. Step 6: Final answer
   x = 64.09