Finding the Fourth Proportional to 83.56, 125.37 and 42.97

Step by Step Solution

1. Step 1: Write the proportion equation
   83.56 : 125.37 = 42.97 : x
2. Step 2: Convert to fraction form
   83.56/125.37 = 42.97/x
3. Step 3: Cross multiply
   83.56x = 125.37 × 42.97
4. Step 4: Simplify right side
   83.56x = 5,387.15
5. Step 5: Solve for x
   x = 5,387.15/83.56
6. Step 6: Final answer
   x = 64.47