Finding the Fourth Proportional to 67.18, 100.77 and 21.52

Step by Step Solution

1. Step 1: Write the proportion equation
   67.18 : 100.77 = 21.52 : x
2. Step 2: Convert to fraction form
   67.18/100.77 = 21.52/x
3. Step 3: Cross multiply
   67.18x = 100.77 × 21.52
4. Step 4: Simplify right side
   67.18x = 2,168.32
5. Step 5: Solve for x
   x = 2,168.32/67.18
6. Step 6: Final answer
   x = 32.28