Finding the Fourth Proportional to 83.96, 125.86 and 42.76

Step by Step Solution

1. Step 1: Write the proportion equation
   83.96 : 125.86 = 42.76 : x
2. Step 2: Convert to fraction form
   83.96/125.86 = 42.76/x
3. Step 3: Cross multiply
   83.96x = 125.86 × 42.76
4. Step 4: Simplify right side
   83.96x = 5,381.14
5. Step 5: Solve for x
   x = 5,381.14/83.96
6. Step 6: Final answer
   x = 64.09