Finding the Third Proportional to 428,870 and 630,832

Step by Step Solution

1. Step 1: Write the proportion equation
   428,870 : 630,832 = 630,832 : x
2. Step 2: Convert to fraction form
   428,870/630,832 = 630,832/x
3. Step 3: Cross multiply
   428,870x = 630,832 × 630,832
4. Step 4: Simplify right side
   428,870x = 397,949,012,224
5. Step 5: Solve for x
   x = 397,949,012,224/428,870
6. Step 6: Final answer
   x = 927,901.26