Finding the Third Proportional to 378,424.88 and 630,684

Step by Step Solution

1. Step 1: Write the proportion equation
   378,424.88 : 630,684 = 630,684 : x
2. Step 2: Convert to fraction form
   378,424.88/630,684 = 630,684/x
3. Step 3: Cross multiply
   378,424.88x = 630,684 × 630,684
4. Step 4: Simplify right side
   378,424.88x = 397,762,307,856
5. Step 5: Solve for x
   x = 397,762,307,856/378,424.88
6. Step 6: Final answer
   x = 1,051,099.79