Finding the Fourth Proportional to 42.39, 63.17 and 42.19

Step by Step Solution

1. Step 1: Write the proportion equation
   42.39 : 63.17 = 42.19 : x
2. Step 2: Convert to fraction form
   42.39/63.17 = 42.19/x
3. Step 3: Cross multiply
   42.39x = 63.17 × 42.19
4. Step 4: Simplify right side
   42.39x = 2,665.14
5. Step 5: Solve for x
   x = 2,665.14/42.39
6. Step 6: Final answer
   x = 62.87