Finding the Third Proportional to 139,830 and 302,988

Step by Step Solution

1. Step 1: Write the proportion equation
   139,830 : 302,988 = 302,988 : x
2. Step 2: Convert to fraction form
   139,830/302,988 = 302,988/x
3. Step 3: Cross multiply
   139,830x = 302,988 × 302,988
4. Step 4: Simplify right side
   139,830x = 91,801,728,144
5. Step 5: Solve for x
   x = 91,801,728,144/139,830
6. Step 6: Final answer
   x = 656,523.84