Finding the Third Proportional to 359,720 and 777,075.50

Step by Step Solution

1. Step 1: Write the proportion equation
   359,720 : 777,075.50 = 777,075.50 : x
2. Step 2: Convert to fraction form
   359,720/777,075.50 = 777,075.50/x
3. Step 3: Cross multiply
   359,720x = 777,075.50 × 777,075.50
4. Step 4: Simplify right side
   359,720x = 603,846,332,700.25
5. Step 5: Solve for x
   x = 603,846,332,700.25/359,720
6. Step 6: Final answer
   x = 1,678,656.55