Finding the Third Proportional to 328,648 and 707,112

Step by Step Solution

1. Step 1: Write the proportion equation
   328,648 : 707,112 = 707,112 : x
2. Step 2: Convert to fraction form
   328,648/707,112 = 707,112/x
3. Step 3: Cross multiply
   328,648x = 707,112 × 707,112
4. Step 4: Simplify right side
   328,648x = 500,007,380,544
5. Step 5: Solve for x
   x = 500,007,380,544/328,648
6. Step 6: Final answer
   x = 1,521,407.04