Finding the Fourth Proportional to 99.95, 149.83 and 82.79

Step by Step Solution

1. Step 1: Write the proportion equation
   99.95 : 149.83 = 82.79 : x
2. Step 2: Convert to fraction form
   99.95/149.83 = 82.79/x
3. Step 3: Cross multiply
   99.95x = 149.83 × 82.79
4. Step 4: Simplify right side
   99.95x = 12,404.03
5. Step 5: Solve for x
   x = 12,404.03/99.95
6. Step 6: Final answer
   x = 124.11