Finding the Third Proportional to 139.29 and 304.52

Step by Step Solution

1. Step 1: Write the proportion equation
   139.29 : 304.52 = 304.52 : x
2. Step 2: Convert to fraction form
   139.29/304.52 = 304.52/x
3. Step 3: Cross multiply
   139.29x = 304.52 × 304.52
4. Step 4: Simplify right side
   139.29x = 92,734.52
5. Step 5: Solve for x
   x = 92,734.52/139.29
6. Step 6: Final answer
   x = 665.77