Finding the Fourth Proportional to 72.52, 108.14 and 69.89

Step by Step Solution

1. Step 1: Write the proportion equation
   72.52 : 108.14 = 69.89 : x
2. Step 2: Convert to fraction form
   72.52/108.14 = 69.89/x
3. Step 3: Cross multiply
   72.52x = 108.14 × 69.89
4. Step 4: Simplify right side
   72.52x = 7,557.73
5. Step 5: Solve for x
   x = 7,557.73/72.52
6. Step 6: Final answer
   x = 104.21