Finding the Fourth Proportional to 42.63, 63.50 and 41.15

Step by Step Solution

1. Step 1: Write the proportion equation
   42.63 : 63.50 = 41.15 : x
2. Step 2: Convert to fraction form
   42.63/63.50 = 41.15/x
3. Step 3: Cross multiply
   42.63x = 63.50 × 41.15
4. Step 4: Simplify right side
   42.63x = 2,613.03
5. Step 5: Solve for x
   x = 2,613.03/42.63
6. Step 6: Final answer
   x = 61.30