Finding the Third Proportional to 443,596.50 and 688,145.63

Step by Step Solution

1. Step 1: Write the proportion equation
   443,596.50 : 688,145.63 = 688,145.63 : x
2. Step 2: Convert to fraction form
   443,596.50/688,145.63 = 688,145.63/x
3. Step 3: Cross multiply
   443,596.50x = 688,145.63 × 688,145.63
4. Step 4: Simplify right side
   443,596.50x = 473,544,401,206.64
5. Step 5: Solve for x
   x = 473,544,401,206.64/443,596.50
6. Step 6: Final answer
   x = 1,067,511.58