Finding the Third Proportional to 158.91 and 242.86

Step by Step Solution

1. Step 1: Write the proportion equation
   158.91 : 242.86 = 242.86 : x
2. Step 2: Convert to fraction form
   158.91/242.86 = 242.86/x
3. Step 3: Cross multiply
   158.91x = 242.86 × 242.86
4. Step 4: Simplify right side
   158.91x = 58,980.68
5. Step 5: Solve for x
   x = 58,980.68/158.91
6. Step 6: Final answer
   x = 371.17