Finding the Third Proportional to 139.69 and 307.03

Step by Step Solution

1. Step 1: Write the proportion equation
   139.69 : 307.03 = 307.03 : x
2. Step 2: Convert to fraction form
   139.69/307.03 = 307.03/x
3. Step 3: Cross multiply
   139.69x = 307.03 × 307.03
4. Step 4: Simplify right side
   139.69x = 94,268.19
5. Step 5: Solve for x
   x = 94,268.19/139.69
6. Step 6: Final answer
   x = 674.85