Finding the Fourth Proportional to 100.50, 151.13 and 79.98

Step by Step Solution

1. Step 1: Write the proportion equation
   100.50 : 151.13 = 79.98 : x
2. Step 2: Convert to fraction form
   100.50/151.13 = 79.98/x
3. Step 3: Cross multiply
   100.50x = 151.13 × 79.98
4. Step 4: Simplify right side
   100.50x = 12,087.38
5. Step 5: Solve for x
   x = 12,087.38/100.50
6. Step 6: Final answer
   x = 120.27