Finding the Third Proportional to 104.63 and 214.31

Step by Step Solution

1. Step 1: Write the proportion equation
   104.63 : 214.31 = 214.31 : x
2. Step 2: Convert to fraction form
   104.63/214.31 = 214.31/x
3. Step 3: Cross multiply
   104.63x = 214.31 × 214.31
4. Step 4: Simplify right side
   104.63x = 45,929.85
5. Step 5: Solve for x
   x = 45,929.85/104.63
6. Step 6: Final answer
   x = 438.99