Finding the Fourth Proportional to 72.89, 101.28 and 72.14

Step by Step Solution

1. Step 1: Write the proportion equation
   72.89 : 101.28 = 72.14 : x
2. Step 2: Convert to fraction form
   72.89/101.28 = 72.14/x
3. Step 3: Cross multiply
   72.89x = 101.28 × 72.14
4. Step 4: Simplify right side
   72.89x = 7,306.34
5. Step 5: Solve for x
   x = 7,306.34/72.89
6. Step 6: Final answer
   x = 100.24