Finding the Fourth Proportional to 69.72, 105.17 and 67.56

Step by Step Solution

1. Step 1: Write the proportion equation
   69.72 : 105.17 = 67.56 : x
2. Step 2: Convert to fraction form
   69.72/105.17 = 67.56/x
3. Step 3: Cross multiply
   69.72x = 105.17 × 67.56
4. Step 4: Simplify right side
   69.72x = 7,105.29
5. Step 5: Solve for x
   x = 7,105.29/69.72
6. Step 6: Final answer
   x = 101.91