Finding the Fourth Proportional to 82.65, 123.97 and 42.01

Step by Step Solution

1. Step 1: Write the proportion equation
   82.65 : 123.97 = 42.01 : x
2. Step 2: Convert to fraction form
   82.65/123.97 = 42.01/x
3. Step 3: Cross multiply
   82.65x = 123.97 × 42.01
4. Step 4: Simplify right side
   82.65x = 5,207.98
5. Step 5: Solve for x
   x = 5,207.98/82.65
6. Step 6: Final answer
   x = 63.01