Finding the Third Proportional to 690,432 and 1,428,790

Step by Step Solution

1. Step 1: Write the proportion equation
   690,432 : 1,428,790 = 1,428,790 : x
2. Step 2: Convert to fraction form
   690,432/1,428,790 = 1,428,790/x
3. Step 3: Cross multiply
   690,432x = 1,428,790 × 1,428,790
4. Step 4: Simplify right side
   690,432x = 2,041,440,864,100
5. Step 5: Solve for x
   x = 2,041,440,864,100/690,432
6. Step 6: Final answer
   x = 2,956,758.76