Finding the Fourth Proportional to 83.38, 125.18 and 42.83

Step by Step Solution

1. Step 1: Write the proportion equation
   83.38 : 125.18 = 42.83 : x
2. Step 2: Convert to fraction form
   83.38/125.18 = 42.83/x
3. Step 3: Cross multiply
   83.38x = 125.18 × 42.83
4. Step 4: Simplify right side
   83.38x = 5,361.25
5. Step 5: Solve for x
   x = 5,361.25/83.38
6. Step 6: Final answer
   x = 64.30