Finding the Third Proportional to 307,103 and 664,510

Step by Step Solution

1. Step 1: Write the proportion equation
   307,103 : 664,510 = 664,510 : x
2. Step 2: Convert to fraction form
   307,103/664,510 = 664,510/x
3. Step 3: Cross multiply
   307,103x = 664,510 × 664,510
4. Step 4: Simplify right side
   307,103x = 441,573,540,100
5. Step 5: Solve for x
   x = 441,573,540,100/307,103
6. Step 6: Final answer
   x = 1,437,867.88