Finding the Third Proportional to 289,359 and 447,997.50

Step by Step Solution

1. Step 1: Write the proportion equation
   289,359 : 447,997.50 = 447,997.50 : x
2. Step 2: Convert to fraction form
   289,359/447,997.50 = 447,997.50/x
3. Step 3: Cross multiply
   289,359x = 447,997.50 × 447,997.50
4. Step 4: Simplify right side
   289,359x = 200,701,760,006.25
5. Step 5: Solve for x
   x = 200,701,760,006.25/289,359
6. Step 6: Final answer
   x = 693,608.15