Finding the Fourth Proportional to 67.00, 100.50 and 21.39

Step by Step Solution

1. Step 1: Write the proportion equation
   67.00 : 100.50 = 21.39 : x
2. Step 2: Convert to fraction form
   67.00/100.50 = 21.39/x
3. Step 3: Cross multiply
   67.00x = 100.50 × 21.39
4. Step 4: Simplify right side
   67.00x = 2,149.32
5. Step 5: Solve for x
   x = 2,149.32/67.00
6. Step 6: Final answer
   x = 32.08