Finding the Third Proportional to 870,840 and 1,345,087

Step by Step Solution

1. Step 1: Write the proportion equation
   870,840 : 1,345,087 = 1,345,087 : x
2. Step 2: Convert to fraction form
   870,840/1,345,087 = 1,345,087/x
3. Step 3: Cross multiply
   870,840x = 1,345,087 × 1,345,087
4. Step 4: Simplify right side
   870,840x = 1,809,259,037,569
5. Step 5: Solve for x
   x = 1,809,259,037,569/870,840
6. Step 6: Final answer
   x = 2,077,602.13