Finding the Third Proportional to 288,856 and 630,200

Step by Step Solution

1. Step 1: Write the proportion equation
   288,856 : 630,200 = 630,200 : x
2. Step 2: Convert to fraction form
   288,856/630,200 = 630,200/x
3. Step 3: Cross multiply
   288,856x = 630,200 × 630,200
4. Step 4: Simplify right side
   288,856x = 397,152,040,000
5. Step 5: Solve for x
   x = 397,152,040,000/288,856
6. Step 6: Final answer
   x = 1,374,913.59