Finding the Third Proportional to 303,318 and 660,418.50

Step by Step Solution

1. Step 1: Write the proportion equation
   303,318 : 660,418.50 = 660,418.50 : x
2. Step 2: Convert to fraction form
   303,318/660,418.50 = 660,418.50/x
3. Step 3: Cross multiply
   303,318x = 660,418.50 × 660,418.50
4. Step 4: Simplify right side
   303,318x = 436,152,595,142.25
5. Step 5: Solve for x
   x = 436,152,595,142.25/303,318
6. Step 6: Final answer
   x = 1,437,938.39