Finding the Third Proportional to 402,442 and 851,470

Step by Step Solution

1. Step 1: Write the proportion equation
   402,442 : 851,470 = 851,470 : x
2. Step 2: Convert to fraction form
   402,442/851,470 = 851,470/x
3. Step 3: Cross multiply
   402,442x = 851,470 × 851,470
4. Step 4: Simplify right side
   402,442x = 725,001,160,900
5. Step 5: Solve for x
   x = 725,001,160,900/402,442
6. Step 6: Final answer
   x = 1,801,504.72