Finding the Fourth Proportional to 83.56, 125.34 and 42.94

Step by Step Solution

1. Step 1: Write the proportion equation
   83.56 : 125.34 = 42.94 : x
2. Step 2: Convert to fraction form
   83.56/125.34 = 42.94/x
3. Step 3: Cross multiply
   83.56x = 125.34 × 42.94
4. Step 4: Simplify right side
   83.56x = 5,382.10
5. Step 5: Solve for x
   x = 5,382.10/83.56
6. Step 6: Final answer
   x = 64.41