Finding the Third Proportional to 280,292 and 435,200

Step by Step Solution

1. Step 1: Write the proportion equation
   280,292 : 435,200 = 435,200 : x
2. Step 2: Convert to fraction form
   280,292/435,200 = 435,200/x
3. Step 3: Cross multiply
   280,292x = 435,200 × 435,200
4. Step 4: Simplify right side
   280,292x = 189,399,040,000
5. Step 5: Solve for x
   x = 189,399,040,000/280,292
6. Step 6: Final answer
   x = 675,720.46