Finding the Third Proportional to 309,099.50 and 659,027

Step by Step Solution

1. Step 1: Write the proportion equation
   309,099.50 : 659,027 = 659,027 : x
2. Step 2: Convert to fraction form
   309,099.50/659,027 = 659,027/x
3. Step 3: Cross multiply
   309,099.50x = 659,027 × 659,027
4. Step 4: Simplify right side
   309,099.50x = 434,316,586,729
5. Step 5: Solve for x
   x = 434,316,586,729/309,099.50
6. Step 6: Final answer
   x = 1,405,102.84