Finding the Fourth Proportional to 42.47, 63.36 and 42.17

Step by Step Solution

1. Step 1: Write the proportion equation
   42.47 : 63.36 = 42.17 : x
2. Step 2: Convert to fraction form
   42.47/63.36 = 42.17/x
3. Step 3: Cross multiply
   42.47x = 63.36 × 42.17
4. Step 4: Simplify right side
   42.47x = 2,671.84
5. Step 5: Solve for x
   x = 2,671.84/42.47
6. Step 6: Final answer
   x = 62.91