Finding the Fourth Proportional to 99.94, 149.91 and 80.59

Step by Step Solution

1. Step 1: Write the proportion equation
   99.94 : 149.91 = 80.59 : x
2. Step 2: Convert to fraction form
   99.94/149.91 = 80.59/x
3. Step 3: Cross multiply
   99.94x = 149.91 × 80.59
4. Step 4: Simplify right side
   99.94x = 12,081.25
5. Step 5: Solve for x
   x = 12,081.25/99.94
6. Step 6: Final answer
   x = 120.89