Finding the Fourth Proportional to 83.52, 125.18 and 42.88

Step by Step Solution

1. Step 1: Write the proportion equation
   83.52 : 125.18 = 42.88 : x
2. Step 2: Convert to fraction form
   83.52/125.18 = 42.88/x
3. Step 3: Cross multiply
   83.52x = 125.18 × 42.88
4. Step 4: Simplify right side
   83.52x = 5,367.72
5. Step 5: Solve for x
   x = 5,367.72/83.52
6. Step 6: Final answer
   x = 64.27