Finding the Third Proportional to 329,278 and 707,648

Step by Step Solution

1. Step 1: Write the proportion equation
   329,278 : 707,648 = 707,648 : x
2. Step 2: Convert to fraction form
   329,278/707,648 = 707,648/x
3. Step 3: Cross multiply
   329,278x = 707,648 × 707,648
4. Step 4: Simplify right side
   329,278x = 500,765,691,904
5. Step 5: Solve for x
   x = 500,765,691,904/329,278
6. Step 6: Final answer
   x = 1,520,799.12