Finding the Fourth Proportional to 83.20, 124.62 and 42.52

Step by Step Solution

1. Step 1: Write the proportion equation
   83.20 : 124.62 = 42.52 : x
2. Step 2: Convert to fraction form
   83.20/124.62 = 42.52/x
3. Step 3: Cross multiply
   83.20x = 124.62 × 42.52
4. Step 4: Simplify right side
   83.20x = 5,298.84
5. Step 5: Solve for x
   x = 5,298.84/83.20
6. Step 6: Final answer
   x = 63.69