Finding the Third Proportional to 297,086 and 618,648

Step by Step Solution

1. Step 1: Write the proportion equation
   297,086 : 618,648 = 618,648 : x
2. Step 2: Convert to fraction form
   297,086/618,648 = 618,648/x
3. Step 3: Cross multiply
   297,086x = 618,648 × 618,648
4. Step 4: Simplify right side
   297,086x = 382,725,347,904
5. Step 5: Solve for x
   x = 382,725,347,904/297,086
6. Step 6: Final answer
   x = 1,288,264.50