Finding the Third Proportional to 100.91 and 158.58

Step by Step Solution

1. Step 1: Write the proportion equation
   100.91 : 158.58 = 158.58 : x
2. Step 2: Convert to fraction form
   100.91/158.58 = 158.58/x
3. Step 3: Cross multiply
   100.91x = 158.58 × 158.58
4. Step 4: Simplify right side
   100.91x = 25,147.25
5. Step 5: Solve for x
   x = 25,147.25/100.91
6. Step 6: Final answer
   x = 249.20