Finding the Third Proportional to 443,865 and 686,512.50

Step by Step Solution

1. Step 1: Write the proportion equation
   443,865 : 686,512.50 = 686,512.50 : x
2. Step 2: Convert to fraction form
   443,865/686,512.50 = 686,512.50/x
3. Step 3: Cross multiply
   443,865x = 686,512.50 × 686,512.50
4. Step 4: Simplify right side
   443,865x = 471,299,412,656.25
5. Step 5: Solve for x
   x = 471,299,412,656.25/443,865
6. Step 6: Final answer
   x = 1,061,808.01