Finding the Third Proportional to 109.45 and 238.17

Step by Step Solution

1. Step 1: Write the proportion equation
   109.45 : 238.17 = 238.17 : x
2. Step 2: Convert to fraction form
   109.45/238.17 = 238.17/x
3. Step 3: Cross multiply
   109.45x = 238.17 × 238.17
4. Step 4: Simplify right side
   109.45x = 56,725.84
5. Step 5: Solve for x
   x = 56,725.84/109.45
6. Step 6: Final answer
   x = 518.27