Finding the Third Proportional to 484,354.50 and 664,890

Step by Step Solution

1. Step 1: Write the proportion equation
   484,354.50 : 664,890 = 664,890 : x
2. Step 2: Convert to fraction form
   484,354.50/664,890 = 664,890/x
3. Step 3: Cross multiply
   484,354.50x = 664,890 × 664,890
4. Step 4: Simplify right side
   484,354.50x = 442,078,712,100
5. Step 5: Solve for x
   x = 442,078,712,100/484,354.50
6. Step 6: Final answer
   x = 912,717.26