Finding the Fourth Proportional to 84.82, 127.23 and 42.10

Step by Step Solution

1. Step 1: Write the proportion equation
   84.82 : 127.23 = 42.10 : x
2. Step 2: Convert to fraction form
   84.82/127.23 = 42.10/x
3. Step 3: Cross multiply
   84.82x = 127.23 × 42.10
4. Step 4: Simplify right side
   84.82x = 5,356.38
5. Step 5: Solve for x
   x = 5,356.38/84.82
6. Step 6: Final answer
   x = 63.15