Finding the Fourth Proportional to 83.03, 124.38 and 42.39

Step by Step Solution

1. Step 1: Write the proportion equation
   83.03 : 124.38 = 42.39 : x
2. Step 2: Convert to fraction form
   83.03/124.38 = 42.39/x
3. Step 3: Cross multiply
   83.03x = 124.38 × 42.39
4. Step 4: Simplify right side
   83.03x = 5,272.47
5. Step 5: Solve for x
   x = 5,272.47/83.03
6. Step 6: Final answer
   x = 63.50