Finding the Third Proportional to 139.22 and 204.61

Step by Step Solution

1. Step 1: Write the proportion equation
   139.22 : 204.61 = 204.61 : x
2. Step 2: Convert to fraction form
   139.22/204.61 = 204.61/x
3. Step 3: Cross multiply
   139.22x = 204.61 × 204.61
4. Step 4: Simplify right side
   139.22x = 41,865.00
5. Step 5: Solve for x
   x = 41,865.00/139.22
6. Step 6: Final answer
   x = 300.71