Finding the Third Proportional to 445,060 and 671,406

Step by Step Solution

1. Step 1: Write the proportion equation
   445,060 : 671,406 = 671,406 : x
2. Step 2: Convert to fraction form
   445,060/671,406 = 671,406/x
3. Step 3: Cross multiply
   445,060x = 671,406 × 671,406
4. Step 4: Simplify right side
   445,060x = 450,786,016,836
5. Step 5: Solve for x
   x = 450,786,016,836/445,060
6. Step 6: Final answer
   x = 1,012,865.72