Finding the Fourth Proportional to 72.62, 108.04 and 71.98

Step by Step Solution

1. Step 1: Write the proportion equation
   72.62 : 108.04 = 71.98 : x
2. Step 2: Convert to fraction form
   72.62/108.04 = 71.98/x
3. Step 3: Cross multiply
   72.62x = 108.04 × 71.98
4. Step 4: Simplify right side
   72.62x = 7,776.72
5. Step 5: Solve for x
   x = 7,776.72/72.62
6. Step 6: Final answer
   x = 107.09