Finding the Third Proportional to 285,252 and 443,654

Step by Step Solution

1. Step 1: Write the proportion equation
   285,252 : 443,654 = 443,654 : x
2. Step 2: Convert to fraction form
   285,252/443,654 = 443,654/x
3. Step 3: Cross multiply
   285,252x = 443,654 × 443,654
4. Step 4: Simplify right side
   285,252x = 196,828,871,716
5. Step 5: Solve for x
   x = 196,828,871,716/285,252
6. Step 6: Final answer
   x = 690,017.50