Finding the Fourth Proportional to 82.63, 123.95 and 42.08

Step by Step Solution

1. Step 1: Write the proportion equation
   82.63 : 123.95 = 42.08 : x
2. Step 2: Convert to fraction form
   82.63/123.95 = 42.08/x
3. Step 3: Cross multiply
   82.63x = 123.95 × 42.08
4. Step 4: Simplify right side
   82.63x = 5,215.82
5. Step 5: Solve for x
   x = 5,215.82/82.63
6. Step 6: Final answer
   x = 63.12