Finding the Third Proportional to 99.42 and 108.42

Step by Step Solution

1. Step 1: Write the proportion equation
   99.42 : 108.42 = 108.42 : x
2. Step 2: Convert to fraction form
   99.42/108.42 = 108.42/x
3. Step 3: Cross multiply
   99.42x = 108.42 × 108.42
4. Step 4: Simplify right side
   99.42x = 11,755.30
5. Step 5: Solve for x
   x = 11,755.30/99.42
6. Step 6: Final answer
   x = 118.24