Finding the Third Proportional to 139.30 and 301.38

Step by Step Solution

1. Step 1: Write the proportion equation
   139.30 : 301.38 = 301.38 : x
2. Step 2: Convert to fraction form
   139.30/301.38 = 301.38/x
3. Step 3: Cross multiply
   139.30x = 301.38 × 301.38
4. Step 4: Simplify right side
   139.30x = 90,828.07
5. Step 5: Solve for x
   x = 90,828.07/139.30
6. Step 6: Final answer
   x = 652.04