Finding the Fourth Proportional to 102.72, 141.71 and 67.29

Step by Step Solution

1. Step 1: Write the proportion equation
   102.72 : 141.71 = 67.29 : x
2. Step 2: Convert to fraction form
   102.72/141.71 = 67.29/x
3. Step 3: Cross multiply
   102.72x = 141.71 × 67.29
4. Step 4: Simplify right side
   102.72x = 9,535.67
5. Step 5: Solve for x
   x = 9,535.67/102.72
6. Step 6: Final answer
   x = 92.83