Finding the Third Proportional to 398,259 and 630,932

Step by Step Solution

1. Step 1: Write the proportion equation
   398,259 : 630,932 = 630,932 : x
2. Step 2: Convert to fraction form
   398,259/630,932 = 630,932/x
3. Step 3: Cross multiply
   398,259x = 630,932 × 630,932
4. Step 4: Simplify right side
   398,259x = 398,075,188,624
5. Step 5: Solve for x
   x = 398,075,188,624/398,259
6. Step 6: Final answer
   x = 999,538.46