Finding the Third Proportional to 303,498 and 664,816.50

Step by Step Solution

1. Step 1: Write the proportion equation
   303,498 : 664,816.50 = 664,816.50 : x
2. Step 2: Convert to fraction form
   303,498/664,816.50 = 664,816.50/x
3. Step 3: Cross multiply
   303,498x = 664,816.50 × 664,816.50
4. Step 4: Simplify right side
   303,498x = 441,980,978,672.25
5. Step 5: Solve for x
   x = 441,980,978,672.25/303,498
6. Step 6: Final answer
   x = 1,456,289.59