Finding the Third Proportional to 443,839.50 and 686,475

Step by Step Solution

1. Step 1: Write the proportion equation
   443,839.50 : 686,475 = 686,475 : x
2. Step 2: Convert to fraction form
   443,839.50/686,475 = 686,475/x
3. Step 3: Cross multiply
   443,839.50x = 686,475 × 686,475
4. Step 4: Simplify right side
   443,839.50x = 471,247,925,625
5. Step 5: Solve for x
   x = 471,247,925,625/443,839.50
6. Step 6: Final answer
   x = 1,061,753.01