Finding the Third Proportional to 443,885 and 686,543.50

Step by Step Solution

1. Step 1: Write the proportion equation
   443,885 : 686,543.50 = 686,543.50 : x
2. Step 2: Convert to fraction form
   443,885/686,543.50 = 686,543.50/x
3. Step 3: Cross multiply
   443,885x = 686,543.50 × 686,543.50
4. Step 4: Simplify right side
   443,885x = 471,341,977,392.25
5. Step 5: Solve for x
   x = 471,341,977,392.25/443,885
6. Step 6: Final answer
   x = 1,061,856.06