Finding the Third Proportional to 870,828 and 1,345,069

Step by Step Solution

1. Step 1: Write the proportion equation
   870,828 : 1,345,069 = 1,345,069 : x
2. Step 2: Convert to fraction form
   870,828/1,345,069 = 1,345,069/x
3. Step 3: Cross multiply
   870,828x = 1,345,069 × 1,345,069
4. Step 4: Simplify right side
   870,828x = 1,809,210,614,761
5. Step 5: Solve for x
   x = 1,809,210,614,761/870,828
6. Step 6: Final answer
   x = 2,077,575.15