Finding the Fourth Proportional to 42.37, 63.15 and 42.30

Step by Step Solution

1. Step 1: Write the proportion equation
   42.37 : 63.15 = 42.30 : x
2. Step 2: Convert to fraction form
   42.37/63.15 = 42.30/x
3. Step 3: Cross multiply
   42.37x = 63.15 × 42.30
4. Step 4: Simplify right side
   42.37x = 2,671.30
5. Step 5: Solve for x
   x = 2,671.30/42.37
6. Step 6: Final answer
   x = 63.05