Finding the Fourth Proportional to 67.02, 100.60 and 50.72

Step by Step Solution

1. Step 1: Write the proportion equation
   67.02 : 100.60 = 50.72 : x
2. Step 2: Convert to fraction form
   67.02/100.60 = 50.72/x
3. Step 3: Cross multiply
   67.02x = 100.60 × 50.72
4. Step 4: Simplify right side
   67.02x = 5,102.43
5. Step 5: Solve for x
   x = 5,102.43/67.02
6. Step 6: Final answer
   x = 76.13