Finding the Fourth Proportional to 82.98, 124.47 and 42.30

Step by Step Solution

1. Step 1: Write the proportion equation
   82.98 : 124.47 = 42.30 : x
2. Step 2: Convert to fraction form
   82.98/124.47 = 42.30/x
3. Step 3: Cross multiply
   82.98x = 124.47 × 42.30
4. Step 4: Simplify right side
   82.98x = 5,265.08
5. Step 5: Solve for x
   x = 5,265.08/82.98
6. Step 6: Final answer
   x = 63.45