Finding the Fourth Proportional to 99.82, 149.72 and 48.42

Step by Step Solution

1. Step 1: Write the proportion equation
   99.82 : 149.72 = 48.42 : x
2. Step 2: Convert to fraction form
   99.82/149.72 = 48.42/x
3. Step 3: Cross multiply
   99.82x = 149.72 × 48.42
4. Step 4: Simplify right side
   99.82x = 7,249.20
5. Step 5: Solve for x
   x = 7,249.20/99.82
6. Step 6: Final answer
   x = 72.62