Finding the Third Proportional to 288,280.69 and 630,856.69

Step by Step Solution

1. Step 1: Write the proportion equation
   288,280.69 : 630,856.69 = 630,856.69 : x
2. Step 2: Convert to fraction form
   288,280.69/630,856.69 = 630,856.69/x
3. Step 3: Cross multiply
   288,280.69x = 630,856.69 × 630,856.69
4. Step 4: Simplify right side
   288,280.69x = 397,980,160,163.47
5. Step 5: Solve for x
   x = 397,980,160,163.47/288,280.69
6. Step 6: Final answer
   x = 1,380,530.08