Finding the Fourth Proportional to 83.42, 124.90 and 42.76

Step by Step Solution

1. Step 1: Write the proportion equation
   83.42 : 124.90 = 42.76 : x
2. Step 2: Convert to fraction form
   83.42/124.90 = 42.76/x
3. Step 3: Cross multiply
   83.42x = 124.90 × 42.76
4. Step 4: Simplify right side
   83.42x = 5,340.77
5. Step 5: Solve for x
   x = 5,340.77/83.42
6. Step 6: Final answer
   x = 64.02