Finding the Third Proportional to 870,684 and 1,345,428

Step by Step Solution

1. Step 1: Write the proportion equation
   870,684 : 1,345,428 = 1,345,428 : x
2. Step 2: Convert to fraction form
   870,684/1,345,428 = 1,345,428/x
3. Step 3: Cross multiply
   870,684x = 1,345,428 × 1,345,428
4. Step 4: Simplify right side
   870,684x = 1,810,176,503,184
5. Step 5: Solve for x
   x = 1,810,176,503,184/870,684
6. Step 6: Final answer
   x = 2,079,028.10