Finding the Third Proportional to 603,649 and 816,897.50

Step by Step Solution

1. Step 1: Write the proportion equation
   603,649 : 816,897.50 = 816,897.50 : x
2. Step 2: Convert to fraction form
   603,649/816,897.50 = 816,897.50/x
3. Step 3: Cross multiply
   603,649x = 816,897.50 × 816,897.50
4. Step 4: Simplify right side
   603,649x = 667,321,525,506.25
5. Step 5: Solve for x
   x = 667,321,525,506.25/603,649
6. Step 6: Final answer
   x = 1,105,479.39