Finding the Fourth Proportional to 72.42, 99.33 and 71.09

Step by Step Solution

1. Step 1: Write the proportion equation
   72.42 : 99.33 = 71.09 : x
2. Step 2: Convert to fraction form
   72.42/99.33 = 71.09/x
3. Step 3: Cross multiply
   72.42x = 99.33 × 71.09
4. Step 4: Simplify right side
   72.42x = 7,061.37
5. Step 5: Solve for x
   x = 7,061.37/72.42
6. Step 6: Final answer
   x = 97.51