Finding the Fourth Proportional to 67.60, 100.72 and 60.42

Step by Step Solution

1. Step 1: Write the proportion equation
   67.60 : 100.72 = 60.42 : x
2. Step 2: Convert to fraction form
   67.60/100.72 = 60.42/x
3. Step 3: Cross multiply
   67.60x = 100.72 × 60.42
4. Step 4: Simplify right side
   67.60x = 6,085.50
5. Step 5: Solve for x
   x = 6,085.50/67.60
6. Step 6: Final answer
   x = 90.02