Finding the Third Proportional to 283,320 and 619,200

Step by Step Solution

1. Step 1: Write the proportion equation
   283,320 : 619,200 = 619,200 : x
2. Step 2: Convert to fraction form
   283,320/619,200 = 619,200/x
3. Step 3: Cross multiply
   283,320x = 619,200 × 619,200
4. Step 4: Simplify right side
   283,320x = 383,408,640,000
5. Step 5: Solve for x
   x = 383,408,640,000/283,320
6. Step 6: Final answer
   x = 1,353,270.65