Finding the Fourth Proportional to 67.29, 100.77 and 42.84

Step by Step Solution

1. Step 1: Write the proportion equation
   67.29 : 100.77 = 42.84 : x
2. Step 2: Convert to fraction form
   67.29/100.77 = 42.84/x
3. Step 3: Cross multiply
   67.29x = 100.77 × 42.84
4. Step 4: Simplify right side
   67.29x = 4,316.77
5. Step 5: Solve for x
   x = 4,316.77/67.29
6. Step 6: Final answer
   x = 64.15