Finding the Fourth Proportional to 82.99, 124.48 and 42.38

Step by Step Solution

1. Step 1: Write the proportion equation
   82.99 : 124.48 = 42.38 : x
2. Step 2: Convert to fraction form
   82.99/124.48 = 42.38/x
3. Step 3: Cross multiply
   82.99x = 124.48 × 42.38
4. Step 4: Simplify right side
   82.99x = 5,276.18
5. Step 5: Solve for x
   x = 5,276.18/82.99
6. Step 6: Final answer
   x = 63.58