Finding the Third Proportional to 402,308 and 851,270

Step by Step Solution

1. Step 1: Write the proportion equation
   402,308 : 851,270 = 851,270 : x
2. Step 2: Convert to fraction form
   402,308/851,270 = 851,270/x
3. Step 3: Cross multiply
   402,308x = 851,270 × 851,270
4. Step 4: Simplify right side
   402,308x = 724,660,612,900
5. Step 5: Solve for x
   x = 724,660,612,900/402,308
6. Step 6: Final answer
   x = 1,801,258.27