Finding the Third Proportional to 443,141 and 687,472

Step by Step Solution

1. Step 1: Write the proportion equation
   443,141 : 687,472 = 687,472 : x
2. Step 2: Convert to fraction form
   443,141/687,472 = 687,472/x
3. Step 3: Cross multiply
   443,141x = 687,472 × 687,472
4. Step 4: Simplify right side
   443,141x = 472,617,750,784
5. Step 5: Solve for x
   x = 472,617,750,784/443,141
6. Step 6: Final answer
   x = 1,066,517.77