Finding the Third Proportional to 307,683 and 664,573.50

Step by Step Solution

1. Step 1: Write the proportion equation
   307,683 : 664,573.50 = 664,573.50 : x
2. Step 2: Convert to fraction form
   307,683/664,573.50 = 664,573.50/x
3. Step 3: Cross multiply
   307,683x = 664,573.50 × 664,573.50
4. Step 4: Simplify right side
   307,683x = 441,657,936,902.25
5. Step 5: Solve for x
   x = 441,657,936,902.25/307,683
6. Step 6: Final answer
   x = 1,435,431.72