Finding the Third Proportional to 298,542 and 447,628.50

Step by Step Solution

1. Step 1: Write the proportion equation
   298,542 : 447,628.50 = 447,628.50 : x
2. Step 2: Convert to fraction form
   298,542/447,628.50 = 447,628.50/x
3. Step 3: Cross multiply
   298,542x = 447,628.50 × 447,628.50
4. Step 4: Simplify right side
   298,542x = 200,371,274,012.25
5. Step 5: Solve for x
   x = 200,371,274,012.25/298,542
6. Step 6: Final answer
   x = 671,166.11