Finding the Fourth Proportional to 109.89, 151.63 and 72.98

Step by Step Solution

1. Step 1: Write the proportion equation
   109.89 : 151.63 = 72.98 : x
2. Step 2: Convert to fraction form
   109.89/151.63 = 72.98/x
3. Step 3: Cross multiply
   109.89x = 151.63 × 72.98
4. Step 4: Simplify right side
   109.89x = 11,066.64
5. Step 5: Solve for x
   x = 11,066.64/109.89
6. Step 6: Final answer
   x = 100.71