Finding the Third Proportional to 328,947 and 683,749.50

Step by Step Solution

1. Step 1: Write the proportion equation
   328,947 : 683,749.50 = 683,749.50 : x
2. Step 2: Convert to fraction form
   328,947/683,749.50 = 683,749.50/x
3. Step 3: Cross multiply
   328,947x = 683,749.50 × 683,749.50
4. Step 4: Simplify right side
   328,947x = 467,513,378,750.25
5. Step 5: Solve for x
   x = 467,513,378,750.25/328,947
6. Step 6: Final answer
   x = 1,421,242.26