Finding the Third Proportional to 690,120 and 1,065,960

Step by Step Solution

1. Step 1: Write the proportion equation
   690,120 : 1,065,960 = 1,065,960 : x
2. Step 2: Convert to fraction form
   690,120/1,065,960 = 1,065,960/x
3. Step 3: Cross multiply
   690,120x = 1,065,960 × 1,065,960
4. Step 4: Simplify right side
   690,120x = 1,136,270,721,600
5. Step 5: Solve for x
   x = 1,136,270,721,600/690,120
6. Step 6: Final answer
   x = 1,646,482.82