Finding the Fourth Proportional to 100.56, 150.46 and 79.99

Step by Step Solution

1. Step 1: Write the proportion equation
   100.56 : 150.46 = 79.99 : x
2. Step 2: Convert to fraction form
   100.56/150.46 = 79.99/x
3. Step 3: Cross multiply
   100.56x = 150.46 × 79.99
4. Step 4: Simplify right side
   100.56x = 12,034.72
5. Step 5: Solve for x
   x = 12,034.72/100.56
6. Step 6: Final answer
   x = 119.68