Finding the Fourth Proportional to 67.21, 100.73 and 59.98

Step by Step Solution

1. Step 1: Write the proportion equation
   67.21 : 100.73 = 59.98 : x
2. Step 2: Convert to fraction form
   67.21/100.73 = 59.98/x
3. Step 3: Cross multiply
   67.21x = 100.73 × 59.98
4. Step 4: Simplify right side
   67.21x = 6,041.49
5. Step 5: Solve for x
   x = 6,041.49/67.21
6. Step 6: Final answer
   x = 89.89