Finding the Fourth Proportional to 109.82, 151.56 and 72.98

Step by Step Solution

1. Step 1: Write the proportion equation
   109.82 : 151.56 = 72.98 : x
2. Step 2: Convert to fraction form
   109.82/151.56 = 72.98/x
3. Step 3: Cross multiply
   109.82x = 151.56 × 72.98
4. Step 4: Simplify right side
   109.82x = 11,060.85
5. Step 5: Solve for x
   x = 11,060.85/109.82
6. Step 6: Final answer
   x = 100.72