Finding the Fourth Proportional to 88.52, 132.69 and 42.79

Step by Step Solution

1. Step 1: Write the proportion equation
   88.52 : 132.69 = 42.79 : x
2. Step 2: Convert to fraction form
   88.52/132.69 = 42.79/x
3. Step 3: Cross multiply
   88.52x = 132.69 × 42.79
4. Step 4: Simplify right side
   88.52x = 5,678.13
5. Step 5: Solve for x
   x = 5,678.13/88.52
6. Step 6: Final answer
   x = 64.14