Finding the Fourth Proportional to 83.58, 125.34 and 42.43

Step by Step Solution

1. Step 1: Write the proportion equation
   83.58 : 125.34 = 42.43 : x
2. Step 2: Convert to fraction form
   83.58/125.34 = 42.43/x
3. Step 3: Cross multiply
   83.58x = 125.34 × 42.43
4. Step 4: Simplify right side
   83.58x = 5,318.18
5. Step 5: Solve for x
   x = 5,318.18/83.58
6. Step 6: Final answer
   x = 63.63