Finding the Third Proportional to 691,145 and 1,081,864

Step by Step Solution

1. Step 1: Write the proportion equation
   691,145 : 1,081,864 = 1,081,864 : x
2. Step 2: Convert to fraction form
   691,145/1,081,864 = 1,081,864/x
3. Step 3: Cross multiply
   691,145x = 1,081,864 × 1,081,864
4. Step 4: Simplify right side
   691,145x = 1,170,429,714,496
5. Step 5: Solve for x
   x = 1,170,429,714,496/691,145
6. Step 6: Final answer
   x = 1,693,464.78