Finding the Third Proportional to 691,208 and 1,036,812

Step by Step Solution

1. Step 1: Write the proportion equation
   691,208 : 1,036,812 = 1,036,812 : x
2. Step 2: Convert to fraction form
   691,208/1,036,812 = 1,036,812/x
3. Step 3: Cross multiply
   691,208x = 1,036,812 × 1,036,812
4. Step 4: Simplify right side
   691,208x = 1,074,979,123,344
5. Step 5: Solve for x
   x = 1,074,979,123,344/691,208
6. Step 6: Final answer
   x = 1,555,218