Finding the Fourth Proportional to 83.06, 124.50 and 42.39

Step by Step Solution

1. Step 1: Write the proportion equation
   83.06 : 124.50 = 42.39 : x
2. Step 2: Convert to fraction form
   83.06/124.50 = 42.39/x
3. Step 3: Cross multiply
   83.06x = 124.50 × 42.39
4. Step 4: Simplify right side
   83.06x = 5,277.71
5. Step 5: Solve for x
   x = 5,277.71/83.06
6. Step 6: Final answer
   x = 63.54