Finding the Fourth Proportional to 82.96, 124.36 and 42.30

Step by Step Solution

1. Step 1: Write the proportion equation
   82.96 : 124.36 = 42.30 : x
2. Step 2: Convert to fraction form
   82.96/124.36 = 42.30/x
3. Step 3: Cross multiply
   82.96x = 124.36 × 42.30
4. Step 4: Simplify right side
   82.96x = 5,260.32
5. Step 5: Solve for x
   x = 5,260.32/82.96
6. Step 6: Final answer
   x = 63.41