Finding the Fourth Proportional to 67.55, 100.91 and 59.99

Step by Step Solution

1. Step 1: Write the proportion equation
   67.55 : 100.91 = 59.99 : x
2. Step 2: Convert to fraction form
   67.55/100.91 = 59.99/x
3. Step 3: Cross multiply
   67.55x = 100.91 × 59.99
4. Step 4: Simplify right side
   67.55x = 6,052.79
5. Step 5: Solve for x
   x = 6,052.79/67.55
6. Step 6: Final answer
   x = 89.61