Finding the Third Proportional to 870,830 and 1,345,072

Step by Step Solution

1. Step 1: Write the proportion equation
   870,830 : 1,345,072 = 1,345,072 : x
2. Step 2: Convert to fraction form
   870,830/1,345,072 = 1,345,072/x
3. Step 3: Cross multiply
   870,830x = 1,345,072 × 1,345,072
4. Step 4: Simplify right side
   870,830x = 1,809,218,685,184
5. Step 5: Solve for x
   x = 1,809,218,685,184/870,830
6. Step 6: Final answer
   x = 2,077,579.65