Finding the Third Proportional to 287,429 and 604,630

Step by Step Solution

1. Step 1: Write the proportion equation
   287,429 : 604,630 = 604,630 : x
2. Step 2: Convert to fraction form
   287,429/604,630 = 604,630/x
3. Step 3: Cross multiply
   287,429x = 604,630 × 604,630
4. Step 4: Simplify right side
   287,429x = 365,577,436,900
5. Step 5: Solve for x
   x = 365,577,436,900/287,429
6. Step 6: Final answer
   x = 1,271,887.79