Finding the Third Proportional to 284,780 and 626,404

Step by Step Solution

1. Step 1: Write the proportion equation
   284,780 : 626,404 = 626,404 : x
2. Step 2: Convert to fraction form
   284,780/626,404 = 626,404/x
3. Step 3: Cross multiply
   284,780x = 626,404 × 626,404
4. Step 4: Simplify right side
   284,780x = 392,381,971,216
5. Step 5: Solve for x
   x = 392,381,971,216/284,780
6. Step 6: Final answer
   x = 1,377,842.44