Finding the Third Proportional to 139.22 and 300.94

Step by Step Solution

1. Step 1: Write the proportion equation
   139.22 : 300.94 = 300.94 : x
2. Step 2: Convert to fraction form
   139.22/300.94 = 300.94/x
3. Step 3: Cross multiply
   139.22x = 300.94 × 300.94
4. Step 4: Simplify right side
   139.22x = 90,563.38
5. Step 5: Solve for x
   x = 90,563.38/139.22
6. Step 6: Final answer
   x = 650.51