Finding the Third Proportional to 140,079 and 209,623.50

Step by Step Solution

1. Step 1: Write the proportion equation
   140,079 : 209,623.50 = 209,623.50 : x
2. Step 2: Convert to fraction form
   140,079/209,623.50 = 209,623.50/x
3. Step 3: Cross multiply
   140,079x = 209,623.50 × 209,623.50
4. Step 4: Simplify right side
   140,079x = 43,942,011,752.25
5. Step 5: Solve for x
   x = 43,942,011,752.25/140,079
6. Step 6: Final answer
   x = 313,694.50