Finding the Third Proportional to 158.91 and 242.58

Step by Step Solution

1. Step 1: Write the proportion equation
   158.91 : 242.58 = 242.58 : x
2. Step 2: Convert to fraction form
   158.91/242.58 = 242.58/x
3. Step 3: Cross multiply
   158.91x = 242.58 × 242.58
4. Step 4: Simplify right side
   158.91x = 58,844.15
5. Step 5: Solve for x
   x = 58,844.15/158.91
6. Step 6: Final answer
   x = 370.31