Finding the Fourth Proportional to 83.18, 124.86 and 42.59

Step by Step Solution

1. Step 1: Write the proportion equation
   83.18 : 124.86 = 42.59 : x
2. Step 2: Convert to fraction form
   83.18/124.86 = 42.59/x
3. Step 3: Cross multiply
   83.18x = 124.86 × 42.59
4. Step 4: Simplify right side
   83.18x = 5,317.16
5. Step 5: Solve for x
   x = 5,317.16/83.18
6. Step 6: Final answer
   x = 63.93