Finding the Third Proportional to 139.50 and 303.47

Step by Step Solution

1. Step 1: Write the proportion equation
   139.50 : 303.47 = 303.47 : x
2. Step 2: Convert to fraction form
   139.50/303.47 = 303.47/x
3. Step 3: Cross multiply
   139.50x = 303.47 × 303.47
4. Step 4: Simplify right side
   139.50x = 92,093.28
5. Step 5: Solve for x
   x = 92,093.28/139.50
6. Step 6: Final answer
   x = 660.17