Finding the Third Proportional to 139,632 and 199,512

Step by Step Solution

1. Step 1: Write the proportion equation
   139,632 : 199,512 = 199,512 : x
2. Step 2: Convert to fraction form
   139,632/199,512 = 199,512/x
3. Step 3: Cross multiply
   139,632x = 199,512 × 199,512
4. Step 4: Simplify right side
   139,632x = 39,805,038,144
5. Step 5: Solve for x
   x = 39,805,038,144/139,632
6. Step 6: Final answer
   x = 285,071.03