Finding the Third Proportional to 428,862 and 630,818

Step by Step Solution

1. Step 1: Write the proportion equation
   428,862 : 630,818 = 630,818 : x
2. Step 2: Convert to fraction form
   428,862/630,818 = 630,818/x
3. Step 3: Cross multiply
   428,862x = 630,818 × 630,818
4. Step 4: Simplify right side
   428,862x = 397,931,349,124
5. Step 5: Solve for x
   x = 397,931,349,124/428,862
6. Step 6: Final answer
   x = 927,877.38