Finding the Fourth Proportional to 42.23, 62.95 and 42.17

Step by Step Solution

1. Step 1: Write the proportion equation
   42.23 : 62.95 = 42.17 : x
2. Step 2: Convert to fraction form
   42.23/62.95 = 42.17/x
3. Step 3: Cross multiply
   42.23x = 62.95 × 42.17
4. Step 4: Simplify right side
   42.23x = 2,654.18
5. Step 5: Solve for x
   x = 2,654.18/42.23
6. Step 6: Final answer
   x = 62.85