Finding the Third Proportional to 610,690 and 897,789

Step by Step Solution

1. Step 1: Write the proportion equation
   610,690 : 897,789 = 897,789 : x
2. Step 2: Convert to fraction form
   610,690/897,789 = 897,789/x
3. Step 3: Cross multiply
   610,690x = 897,789 × 897,789
4. Step 4: Simplify right side
   610,690x = 806,025,088,521
5. Step 5: Solve for x
   x = 806,025,088,521/610,690
6. Step 6: Final answer
   x = 1,319,859.65