Finding the Third Proportional to 300,680 and 653,200

Step by Step Solution

1. Step 1: Write the proportion equation
   300,680 : 653,200 = 653,200 : x
2. Step 2: Convert to fraction form
   300,680/653,200 = 653,200/x
3. Step 3: Cross multiply
   300,680x = 653,200 × 653,200
4. Step 4: Simplify right side
   300,680x = 426,670,240,000
5. Step 5: Solve for x
   x = 426,670,240,000/300,680
6. Step 6: Final answer
   x = 1,419,017.69