Finding the Third Proportional to 435,705 and 684,661.50

Step by Step Solution

1. Step 1: Write the proportion equation
   435,705 : 684,661.50 = 684,661.50 : x
2. Step 2: Convert to fraction form
   435,705/684,661.50 = 684,661.50/x
3. Step 3: Cross multiply
   435,705x = 684,661.50 × 684,661.50
4. Step 4: Simplify right side
   435,705x = 468,761,369,582.25
5. Step 5: Solve for x
   x = 468,761,369,582.25/435,705
6. Step 6: Final answer
   x = 1,075,868.69