Finding the Third Proportional to 360,699.50 and 769,651

Step by Step Solution

1. Step 1: Write the proportion equation
   360,699.50 : 769,651 = 769,651 : x
2. Step 2: Convert to fraction form
   360,699.50/769,651 = 769,651/x
3. Step 3: Cross multiply
   360,699.50x = 769,651 × 769,651
4. Step 4: Simplify right side
   360,699.50x = 592,362,661,801
5. Step 5: Solve for x
   x = 592,362,661,801/360,699.50
6. Step 6: Final answer
   x = 1,642,260.83