Finding the Third Proportional to 428,881 and 630,844

Step by Step Solution

1. Step 1: Write the proportion equation
   428,881 : 630,844 = 630,844 : x
2. Step 2: Convert to fraction form
   428,881/630,844 = 630,844/x
3. Step 3: Cross multiply
   428,881x = 630,844 × 630,844
4. Step 4: Simplify right side
   428,881x = 397,964,152,336
5. Step 5: Solve for x
   x = 397,964,152,336/428,881
6. Step 6: Final answer
   x = 927,912.76