Finding the Third Proportional to 108.42 and 143.37

Step by Step Solution

1. Step 1: Write the proportion equation
   108.42 : 143.37 = 143.37 : x
2. Step 2: Convert to fraction form
   108.42/143.37 = 143.37/x
3. Step 3: Cross multiply
   108.42x = 143.37 × 143.37
4. Step 4: Simplify right side
   108.42x = 20,554.15
5. Step 5: Solve for x
   x = 20,554.15/108.42
6. Step 6: Final answer
   x = 189.58