Finding the Third Proportional to 443,364 and 687,916.50

Step by Step Solution

1. Step 1: Write the proportion equation
   443,364 : 687,916.50 = 687,916.50 : x
2. Step 2: Convert to fraction form
   443,364/687,916.50 = 687,916.50/x
3. Step 3: Cross multiply
   443,364x = 687,916.50 × 687,916.50
4. Step 4: Simplify right side
   443,364x = 473,229,110,972.25
5. Step 5: Solve for x
   x = 473,229,110,972.25/443,364
6. Step 6: Final answer
   x = 1,067,360.25