Finding the Fourth Proportional to 72.98, 109.30 and 69.39

Step by Step Solution

1. Step 1: Write the proportion equation
   72.98 : 109.30 = 69.39 : x
2. Step 2: Convert to fraction form
   72.98/109.30 = 69.39/x
3. Step 3: Cross multiply
   72.98x = 109.30 × 69.39
4. Step 4: Simplify right side
   72.98x = 7,584.33
5. Step 5: Solve for x
   x = 7,584.33/72.98
6. Step 6: Final answer
   x = 103.92