Finding the Fourth Proportional to 83.47, 125.24 and 42.88

Step by Step Solution

1. Step 1: Write the proportion equation
   83.47 : 125.24 = 42.88 : x
2. Step 2: Convert to fraction form
   83.47/125.24 = 42.88/x
3. Step 3: Cross multiply
   83.47x = 125.24 × 42.88
4. Step 4: Simplify right side
   83.47x = 5,370.29
5. Step 5: Solve for x
   x = 5,370.29/83.47
6. Step 6: Final answer
   x = 64.34