Finding the Third Proportional to 690,428 and 1,428,782

Step by Step Solution

1. Step 1: Write the proportion equation
   690,428 : 1,428,782 = 1,428,782 : x
2. Step 2: Convert to fraction form
   690,428/1,428,782 = 1,428,782/x
3. Step 3: Cross multiply
   690,428x = 1,428,782 × 1,428,782
4. Step 4: Simplify right side
   690,428x = 2,041,418,003,524
5. Step 5: Solve for x
   x = 2,041,418,003,524/690,428
6. Step 6: Final answer
   x = 2,956,742.78