Finding the Fourth Proportional to 71.91, 107.33 and 67.59

Step by Step Solution

1. Step 1: Write the proportion equation
   71.91 : 107.33 = 67.59 : x
2. Step 2: Convert to fraction form
   71.91/107.33 = 67.59/x
3. Step 3: Cross multiply
   71.91x = 107.33 × 67.59
4. Step 4: Simplify right side
   71.91x = 7,254.10
5. Step 5: Solve for x
   x = 7,254.10/71.91
6. Step 6: Final answer
   x = 100.88