Finding the Third Proportional to 489,770 and 756,819.50

Step by Step Solution

1. Step 1: Write the proportion equation
   489,770 : 756,819.50 = 756,819.50 : x
2. Step 2: Convert to fraction form
   489,770/756,819.50 = 756,819.50/x
3. Step 3: Cross multiply
   489,770x = 756,819.50 × 756,819.50
4. Step 4: Simplify right side
   489,770x = 572,775,755,580.25
5. Step 5: Solve for x
   x = 572,775,755,580.25/489,770
6. Step 6: Final answer
   x = 1,169,479.05