Finding the Third Proportional to 282,487.50 and 440,406

Step by Step Solution

1. Step 1: Write the proportion equation
   282,487.50 : 440,406 = 440,406 : x
2. Step 2: Convert to fraction form
   282,487.50/440,406 = 440,406/x
3. Step 3: Cross multiply
   282,487.50x = 440,406 × 440,406
4. Step 4: Simplify right side
   282,487.50x = 193,957,444,836
5. Step 5: Solve for x
   x = 193,957,444,836/282,487.50
6. Step 6: Final answer
   x = 686,605.41