Finding the Third Proportional to 378,426 and 630,685.50

Step by Step Solution

1. Step 1: Write the proportion equation
   378,426 : 630,685.50 = 630,685.50 : x
2. Step 2: Convert to fraction form
   378,426/630,685.50 = 630,685.50/x
3. Step 3: Cross multiply
   378,426x = 630,685.50 × 630,685.50
4. Step 4: Simplify right side
   378,426x = 397,764,199,910.25
5. Step 5: Solve for x
   x = 397,764,199,910.25/378,426
6. Step 6: Final answer
   x = 1,051,101.67