Finding the Fourth Proportional to 99.98, 149.63 and 82.73

Step by Step Solution

1. Step 1: Write the proportion equation
   99.98 : 149.63 = 82.73 : x
2. Step 2: Convert to fraction form
   99.98/149.63 = 82.73/x
3. Step 3: Cross multiply
   99.98x = 149.63 × 82.73
4. Step 4: Simplify right side
   99.98x = 12,378.85
5. Step 5: Solve for x
   x = 12,378.85/99.98
6. Step 6: Final answer
   x = 123.82