Finding the Fourth Proportional to 83.46, 125.10 and 42.82

Step by Step Solution

1. Step 1: Write the proportion equation
   83.46 : 125.10 = 42.82 : x
2. Step 2: Convert to fraction form
   83.46/125.10 = 42.82/x
3. Step 3: Cross multiply
   83.46x = 125.10 × 42.82
4. Step 4: Simplify right side
   83.46x = 5,356.78
5. Step 5: Solve for x
   x = 5,356.78/83.46
6. Step 6: Final answer
   x = 64.18