Finding the Third Proportional to 139,644 and 199,530

Step by Step Solution

1. Step 1: Write the proportion equation
   139,644 : 199,530 = 199,530 : x
2. Step 2: Convert to fraction form
   139,644/199,530 = 199,530/x
3. Step 3: Cross multiply
   139,644x = 199,530 × 199,530
4. Step 4: Simplify right side
   139,644x = 39,812,220,900
5. Step 5: Solve for x
   x = 39,812,220,900/139,644
6. Step 6: Final answer
   x = 285,097.97