Finding the Third Proportional to 139,137.75 and 209,997.56

Step by Step Solution

1. Step 1: Write the proportion equation
   139,137.75 : 209,997.56 = 209,997.56 : x
2. Step 2: Convert to fraction form
   139,137.75/209,997.56 = 209,997.56/x
3. Step 3: Cross multiply
   139,137.75x = 209,997.56 × 209,997.56
4. Step 4: Simplify right side
   139,137.75x = 44,098,976,255.94
5. Step 5: Solve for x
   x = 44,098,976,255.94/139,137.75
6. Step 6: Final answer
   x = 316,944.73