Finding the Fourth Proportional to 49.10, 67.61 and 42.18

Step by Step Solution

1. Step 1: Write the proportion equation
   49.10 : 67.61 = 42.18 : x
2. Step 2: Convert to fraction form
   49.10/67.61 = 42.18/x
3. Step 3: Cross multiply
   49.10x = 67.61 × 42.18
4. Step 4: Simplify right side
   49.10x = 2,851.68
5. Step 5: Solve for x
   x = 2,851.68/49.10
6. Step 6: Final answer
   x = 58.08