Finding the Third Proportional to 300,459.50 and 609,217

Step by Step Solution

1. Step 1: Write the proportion equation
   300,459.50 : 609,217 = 609,217 : x
2. Step 2: Convert to fraction form
   300,459.50/609,217 = 609,217/x
3. Step 3: Cross multiply
   300,459.50x = 609,217 × 609,217
4. Step 4: Simplify right side
   300,459.50x = 371,145,353,089
5. Step 5: Solve for x
   x = 371,145,353,089/300,459.50
6. Step 6: Final answer
   x = 1,235,259.17