Finding the Third Proportional to 870,688 and 1,345,435

Step by Step Solution

1. Step 1: Write the proportion equation
   870,688 : 1,345,435 = 1,345,435 : x
2. Step 2: Convert to fraction form
   870,688/1,345,435 = 1,345,435/x
3. Step 3: Cross multiply
   870,688x = 1,345,435 × 1,345,435
4. Step 4: Simplify right side
   870,688x = 1,810,195,339,225
5. Step 5: Solve for x
   x = 1,810,195,339,225/870,688
6. Step 6: Final answer
   x = 2,079,040.18