Finding the Third Proportional to 428,814 and 630,360

Step by Step Solution

1. Step 1: Write the proportion equation
   428,814 : 630,360 = 630,360 : x
2. Step 2: Convert to fraction form
   428,814/630,360 = 630,360/x
3. Step 3: Cross multiply
   428,814x = 630,360 × 630,360
4. Step 4: Simplify right side
   428,814x = 397,353,729,600
5. Step 5: Solve for x
   x = 397,353,729,600/428,814
6. Step 6: Final answer
   x = 926,634.23