Finding the Fourth Proportional to 67.76, 101.72 and 42.08

Step by Step Solution

1. Step 1: Write the proportion equation
   67.76 : 101.72 = 42.08 : x
2. Step 2: Convert to fraction form
   67.76/101.72 = 42.08/x
3. Step 3: Cross multiply
   67.76x = 101.72 × 42.08
4. Step 4: Simplify right side
   67.76x = 4,280.38
5. Step 5: Solve for x
   x = 4,280.38/67.76
6. Step 6: Final answer
   x = 63.17