Finding the Fourth Proportional to 83.94, 125.83 and 43.31

Step by Step Solution

1. Step 1: Write the proportion equation
   83.94 : 125.83 = 43.31 : x
2. Step 2: Convert to fraction form
   83.94/125.83 = 43.31/x
3. Step 3: Cross multiply
   83.94x = 125.83 × 43.31
4. Step 4: Simplify right side
   83.94x = 5,449.70
5. Step 5: Solve for x
   x = 5,449.70/83.94
6. Step 6: Final answer
   x = 64.92