Finding the Third Proportional to 139,104 and 209,308

Step by Step Solution

1. Step 1: Write the proportion equation
   139,104 : 209,308 = 209,308 : x
2. Step 2: Convert to fraction form
   139,104/209,308 = 209,308/x
3. Step 3: Cross multiply
   139,104x = 209,308 × 209,308
4. Step 4: Simplify right side
   139,104x = 43,809,838,864
5. Step 5: Solve for x
   x = 43,809,838,864/139,104
6. Step 6: Final answer
   x = 314,943.06