Finding the Third Proportional to 870,689 and 1,345,437

Step by Step Solution

1. Step 1: Write the proportion equation
   870,689 : 1,345,437 = 1,345,437 : x
2. Step 2: Convert to fraction form
   870,689/1,345,437 = 1,345,437/x
3. Step 3: Cross multiply
   870,689x = 1,345,437 × 1,345,437
4. Step 4: Simplify right side
   870,689x = 1,810,200,720,969
5. Step 5: Solve for x
   x = 1,810,200,720,969/870,689
6. Step 6: Final answer
   x = 2,079,043.98